MST30 & MST155M Series
Multi Service Transmission Equipment
User Manual
Beijing Easy Broadband Technology Co., Ltd
Version: V1.1
1
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from
improper or inadequate maintenance by Buyer, Buyer-supplied firmware or
interfacing, unauthorized modification or misuse, operation outside of the
environmental specifications for the product, or improper site preparation or
maintenance.
General Safety Precautions
Transportation, Installation and Operation
Avoid excessive vibration and shocks.
Avoid contact with water, dust, and dirt.
Avoid excessive direct sunlight.
Ensure sufficient cooling.
Prevent loose items from falling into the device.
Main Powers
Disconnect the power cord before opening the device.
Use exclusively the supplied power supply the approved power cord.
The power plug must be plugged into a properly grounded receptacle. An
improperly wired receptacle could place hazardous voltage on accessible
metal parts of the device.
The mains supply must match the power specification of the device.
Replace blown fuses exclusively with fuses of the same ratings.
Do not work on the equipment during periods of lightning activity.
Technical Support
Before contacting with your support representative, please prepare to
provide the complete serial number of the affected unit (refer to the
according unit label).
2
INSTRUCTION FOR SAFTY USE
MST30 & MST155M series of optical modem within the scope of design
and use are characterized by well-reliable function, however, which should be
avoided damaging and destroying optical modem through human activity.
To read through the manual carefully and preserve the manual well to
give a guide and help in the future;
To prevent the equipment from close to water or wet ground;
To ban from laying any things on power or cable or making the cable
tying or covering ,and then lay down the place being not vulnerable to touch;
Power plug and other equipment joint parts ought to connect stably each
other and keep regular examination.
To be sure to take carefully to connect the lines under the mark of
connecting pole when the power line is linked, the using power must be
comply with the below principles:
1. Direct current -48v type: -36 --- -72v
2. Alternating current 220v type: 220v±20%,50 hz
To keep paying attention to clearing equipment and may use
soft-and-cotton cloth to brush at necessary time;
3
In these cases, please turn off the power immediately and timely keep in
touch with our company:
Water invades equipment.
Equipment with damage or the damage of shell;
Equipment with working failure function or the quality for show with
complete change;
Equipment to come out scent, smoke or noise.
Please don’t to fix equipment in personal, unless with the exception of
definite indication in manual.
4
CONTENT
1 Overview .............................................................6
1.1 General ................................................................. 6
1.2 Features ................................................................ 8
1.3 Principle ............................................................. 10
2 Installation .......................................................12
2.1 Unpacking .......................................................... 12
2.2 Equipment check............................................... 13
2.3 Equipment installation...................................... 13
2.4 Equipment testing ............................................. 14
3 Feature .............................................................15
3.1 Indicators ........................................................... 15
3.2 Dial-up switch .................................................... 28
3.3 Maintenance....................................................... 34
4 Troubleshooting ...............................................40
4.1 Optical LOS Alarm ........................................... 40
4.2 E1 alerting.......................................................... 40
4.3 Peer terminal alerting ....................................... 41
5
4.4 High bit error rate............................................. 41
5 Interface ...........................................................41
5.1 Electric features of E1 interface: ..................... 41
5.2 Optical interface features: ................................ 42
5.3 Manage interface and extend port features: ... 43
5.4 Ethernet interface features:.............................. 44
5.5 Electric features of V.35 interface:................... 45
5.6 Power Supply ..................................................... 48
5.7 Working Environment ...................................... 49
5.8 Dimension........................................................... 49
6 Application .......................................................49
7 Appendix...........................................................52
6
1 Overview
1.1 General
The Optical transmission MST30 Series optical transmitter and
receiver is manufactured by the special integrate circuit which is
developed independently by EBB company. It amalgamates standard
traditional 2M TDM service interface, V.35 service interface and
10/100BaseTx ether data service interface, and changes them into high
speed light signal which can be transmitted through optical fiber. The
customer can choose E1,V.35,10/100 BASE-T interface which applies to
lower capacity switches topology, circular network, mobile telecom base
station, private network, DDN, etc based on his own needs.
MST 30A is 1*E1fiber optic modern;
MST30AV is 1* V.35 fiber optic modem, V.35 interface supports
Nх64K(N=1~32);
MST30AE is 1*10/100M Base-Tx fiber optic modem, Ethernet
data transmit in E1;
MST30CE is 4*10/100M Base-Tx fiber optic modem, Ethernet
data transmit in E1;
MST30VE is 1*10/100M Base-Tx+1*V.35+1*V24 fiber optic
modem, Ethernet and V.35 data framed into E1 and transmits, V24 data
can use E1time slot or not;
MST30CVE is 4*10/100M Base-Tx+1*V.35+1*V24 fiber optic
modem, Ethernet and V.35 data framed into E1 and transmits, V24 data
7
can use E1time slot or not;
With easy maintenance, immediate start as soon as power
connected MST30A, MST30AV, MST30AE, MST30VE, and
MST30CVE optical transmitter and receiver can also provides
centralized frame structure, and integrated network management
function.
MST155M/C multi-service transmission equipment is manufactured
based on our proprietary purpose-built integrated circuits. It integrates the
traditional 2M E1, 10/100Base-Tx (max bandwidth: 100M), and N×64K
V.35 services in one equipment so that it can operate both high-speed
digital service and traditional TDM service in one pair of Fiber.
KMST155C is centralized rack equipment, and is manufactured
based on our proprietary purpose-built integrated circuits. It integrates the
traditional 2M E1, 10/100Base-Tx (max bandwidth: 100M), and N×64K
V.35 services in one equipment so that it can operate both high-speed
digital service and traditional TDM service in one pair of Fiber.
MST155M/C multi-service transmission equipment can also provide
centralized rack structure for easy maintenance as well as plug and play,
and at the same time, provide complete network management functions.
Model Optical E1 V.35 Ethernet RS232 MGMT Structure
MST30A 1 1 1 YES Mini desktop
MST30AV 1 1 1 YES Mini desktop
MST30AE 1 1 1 YES Mini desktop
MST30CE 1 4 1 YES Mini desktop
8
MST30VE 1 1 1 1 YES Mini desktop
MST30CVE 1 1 4 1 YES Mini desktop
MST155M 1 1 1 1 1 YES Mini desktop
MST155MC 1 1 1 4 1 YES Mini desktop
KMST30A 1 1 1 YES
Centralized plug-in
card
KMST30AV 1 1 1 YES
Centralized plug-in
card
KMST30VE 1 1 1 1 YES
Centralized plug-in
card
KMST155M 1 1 1 1 1 YESCentralized plug-in
card
KMST155C 1 4 4 YESCentralized plug-in
card
1.2 Features
MST30A and KMST30A can both provide one E1 digital interface,
impedance 75Ω/120Ω;
MST30AV and KMST30AV can both provide one N×64K V.35
interface (N= 1~32);
9
MST30AE provides one 10/100Base-Tx and MST30CE four
10/100Base-Tx self-adjusted Ethernet interfaces respectively,
bandwidth 2M;
MST30VE and KMST30VE both provide one N×64K V.35 interface,
at the same time, can provide one 10/100Base-Tx self-adjusted ether
interface, bandwidth 2M;
MST30CVE can provide one N×64K V.35 interface (N = 1~32) and
four 10/100Base-Tx self-adjusted ether interface simultaneously,
sum bandwidth 2M;
MST155M,KMST155M provide one E1digital interface, impedance
75Ω/120Ω, one 10/100Base-Tx self-adjusted ether interface, (can be
adjusted by 0.5M and the max bandwidth 100M) + 1* V.35
route(N*64K, speed can be varied);
MST155MC provides one E1 interface impedance 75Ω/120Ω, four
10/100Base-Tx self-adjusted ether interface, (can be adjusted by
0.5M and the max bandwidth 100M) + 1* V.35 route(N*64K, speed
can be varied);
Except MST155M,MST155MC,KMST155M, E1, V35 support set-in
BERT(Bit Error Rate Test);
MST155M,MST155MC,KMST155M support E1 interface and V.35
interface switching;
KMST155C provides four E1 interface, 4 Ethernet interface(can be
adjusted by 0.5M and the max bandwidth 100M)
V.35 interface provides seven kinds of clock module (DCE: native,
reversion, outer input; DTE: RC transmitted and TC received, RC
transmitted and RC received, TC transmitted and TC received, TC
transmitted and RC received), adapted to the requirement of all V.35
10
interface clock module in the present market;
The V.35 interface clock module, phase, time slot selection function
can be set by means of the network management software;
Provide one RS232 asynchronous data interface, max rate is 19.2K;
Provide one management interface, realizing centralized monitor and
supporting system update;
Provide a group of control switches, used for setting the test of
equipment maintenance;
Adjust to many types of power supply environment: +24VDC,
-24VDC, -48VDC or 220VAC;
1.3 Principle
Ethernet, V.35 and V24 data input by MST30A Fiber Optic
Modem transfer into single E1 data . The tributary clock is selected
by special centralized chip, and signal decoding is connected again
to code flow of drive light signal after code speed adjustment.
When entering light receiver, the receiving side light signal is
transmitted into special centralized chip by balanced magnifying
and NRZ signal generated by refreshing circuit for clock selection
and decoding. It recovers as 2048Kb/s signal through code speed
restoring circuit and inner digital locked loop circuit smoothing;
transfer into Ethernet, V35,V24 data then output.
11
Figure 1.1 Principle Frame
The code type of 2048Kb/s (E1) data signal input
transmitting equipment is HDB3, which is changed into monopole
code by single and double switching. The spur track clock is
selected by special centralized chip, and signal decoding is
connected again to code flow of drive light signal after code speed
adjustment. The signal of 10/100Base-Tx transfers into MII
interface data through PHY, then sent into special centralized chip.
Meanwhile the signal is connected again to code flow of drive light
signal after code speed adjustment. Then send by drive circuit and
fiber.
When entering light receiver, the receiving side light signal is
transmitted into special centralized chip by balanced magnifying
and NRZ signal generated by refreshing circuit for clock selection
and decoding. It recovers as 2048Kb/s and MII signal, through
output circuit transfer HDB3 and 10/100Base-Tx signal required
the interface need respectively.
12
Figure 1.2 MST 155M/MST 155MC principle
2 Installation
2.1 Unpacking
1) Fix the installation position of the equipment, clean it up
and move the paper box with the equipment in it near this
installation site.
2) Pay attention to the direction of packing case, ensuring
right up side.
3) Open the box and take out the equipment and accessories.
The equipment is packaged by special box with
anti-vibration protection. There is one machine in each packing
13
case, including corresponding accessories. Please remember to
examine and check whether it accords with packaging sheet.
【 There is precision instrument inside the equipment, please
carefully load and avoid excessive vibration lest affecting the
equipment performance. If you find it damaged or losing any part
during transportation, please notify the company service department
so that we can settle it adequately as soon as possible.】
2.2 Equipment check
Check whether the equipment is intact and damaged or not, and
verify the power condition.
2.3 Equipment installation
1) Take out the equipment, check whether the equipment is
damaged. Fix it to the frame or other device to make sure
that it is stably fixed.
2) Select the input power according to the equipment
arrangement, and connect the power line correctly. Check
whether the power supply is normal when powered on (the
green indicator light POWER shines if the power is
normal), whether the working condition is normal (the
green RUN light glitters) . If the optical fiber is not
14
connected, the light module working indicator light WORK
(green) does not shine and the synchronous lost indicator
light SYNL (red) shines.
3) Connect the optical fire linked to peer equipment, the light
module working indicator WORK (green) shines in normal
condition and the SYNL (red) extinguished; if it is not
normal, please check whether the light channel is normal,
the end fiber can receive and transmit and the peer
equipment is powered.
Connect the E1 signal line, if the side equipment of the customer
can work adequately, the WORK (green) light corresponding this
E1 signal shines, AIS (yellow) light extinguished. As the method
of making E1 signal line, please refer to appendix 2.
2.4 Equipment testing
1) Power supply: connect the line of the power supply
correctly, turn on the power, the power light (Green) should
be on, which indicates that the power works properly. (The
method of connection of DC power please refer to
appendix 3)
2) Equipment operation: When the power is on, the equipment
undergoes initialization; when the RUN light (Green)
twinkles, it shows that the equipment operates normally;
3) Fiber Interface: When the equipment operates normally, use
tail fiber to circulate the fiber interface. If the work light
(Green) of the light module is on and the SYNL(Red)is off,
15
it indicates that the fiber interface works properly.
4) E1, V.35 interface: When the equipment works properly,
make the fiber interface self-loop-back, use error rate
measuring equipment to test E1, V.35 interface, no error
rate indicates normality.
5) Ethernet interface: When the equipment works properly,
use two computers which have net-interface card, to
connect the Ethernet interfaces of the equipment. Ping the
two computers to test whether the receiving/sending packet
is correct.
6) RS232 interface: When the equipment works properly,
make the fiber interface self-loop-back, connect the RS232
interface with PC Serial-Ethernet, operate the “Super
Terminal”in the PCs (9600bit/s), forbid to choose ECHO
of the local character, key in the testing characters, the
received characters will be shown in the window. If they
are the same as the key-ins, it shows that the RS232
interface works properly.
3 Feature
3.1 Indicators
MST series optical transmitter provides a complete
emergency alarm report and situation instructions. If the red light
16
is on, it means serious alarm and the system couldn’t work
normally. If the yellow light is on, it shows there are some alarms,
while the system basically works ok. And the green light shows
the system works properly. The detailed definition of each
instruction light is as follows:
Fig 3.1 Sketch Map of MST30A Front Side
Fig 3.2 Sketch Map of MST30A Back Side
Fig 3.3 Sketch Map of MST30AV Front Side
17
Fig 3.4 Sketch Map of MST30AV Back Side
Fig 3.5 Sketch Map of MST30AE Front Side
Fig 3.6 Sketch Map of MST30AE Back Side
18
Fig3.7 Sketch Map of MST30CE Front Side
Fig 3.8 Sketch Map of MST30CE Back Side
Fig3.9 Sketch Map of MST30VE Front Side
19
Fig 3.10 Sketch Map of MST30VE Back Side
Fig 3.11 Sketch Map of MST30CVE Front Side
Fig 3.12 Sketch Map of MST30CVE Back Side
20
Fig 3.13 Sketch Map of MST155M Front Side
Fig 3.14 Sketch Map of MST155M Back Side
Fig 3.15 Sketch Map of MST155MC Front Side
21
Fig 3.16 Sketch Map of MST155MC Back Side
The alarm instructions of the table-top equipment
Definition Proper Operation Loop-back BERT
POWER
(Green)
If the power supply is
normal, it is ON
RUN
(Green)
Under the status of
dial-up control, it is
sparkling. (On 1/4
second + Off 3/4
second, repeated);
under the status of
network management
control, it is
sparkling.(On 3/4
second+ Off 1/4
second, repeated.)
STA (Yellow) On=frame E1 remote
alarm
Flash with RUN in
It sparkles if not in
simultaneity. It is off if
there is no error code
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phase = local E1
warning
Flash with RUN
reversely= remote E1
warning
under the simultaneous
status.
The light is on if the
error code<10-3, the
light is sparkle if the
error code > 10-3
and maintain the most
serious error code
status after becoming
simultaneously.
SYLOS/1E-3(Red) On when optic LOS
or the error code >10-3
Off if the data from
the fiber interface is
normal
1E-6 (Yellow) On when the error
code of the fiber
interface>10-6
Off if the data from
the fiber interface is
normal;
The light
sparkle loop-back①
Sparkle with
RA in the same time
①
(OPT)WORK
(Green)
On if the fiber
receiving power is
normal
RA (Yellow) On if the light of the
peer interface
disappears or LOS
Sparkles
loop-back this
equipment①
Sparkles with
1E-6 in the same time
①
23
(E1)WORK
(Green)
on while connection,
off while
disconnection.
Sparkles if there
exists loop-back in E1
local equipment
Sparkling indicates
receiving test code
from the local
equipment which
corresponding with E1
interface
AIS (yellow) On when E1 receives
AIS
Sparkles if there
exists loop-back in E1
peer equipment
Sparking indicates
sending test code from
the local equipment
corresponding with E1
interface
FSL Works under the
frame method. On if
the 2M frame losses
simultaneously
Sparkles from the
peer equipment
Sparkling indicates
receiving test code
from the other
interface
corresponding with
local interface
TD Sparkles when the
V.35 interface
sending data
RD Sparkles when the
V.35 interface
receiving data
ULK On if sending data
from V.35 is not
match with the set
clock mode
Sparkle Sparkling indicates
sending test code from
the other interface
corresponding with
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local interface
10/100 Ethernet interface
bps: on=100M,
off=10M
L/A Ethernet interface
connecting status:
on=connection,
sparkle =there are
some data input
① can be used in MST30AE,MST30CE
25
Fig 3.13 Sketch Map of insert-card panel
The alarm instructions of the card-mode equipment
Definition Proper operation Loop-back BERT
P
(Green)
On when 5V power supply is
normal
R Under the status of dial-up
26
(Green) control, it is sparkling. (On
1/4 second + Off 3/4 second,
repeated); under the status of
network management control,
it is sparkling.(On 3/4
second+ Off 1/4 second,
repeated.)
ST
(Yellow)
On=frame E1 remote alarm
Flash with RUN in phase =
E1 local warning
Flash with RUM reversely=
other terminal warning
It sparkles if not in
simultaneity. It is off if
there is no error code
under the simultaneous
status.
The light is on if the
error code<10-3, the
light is sparkle if the
error code > 10-3
and maintain the most
serious error code
status after becoming
simultaneously.
SL (Red) Off if the data from the fiber
interface is normal; on if fiber
LOS or error code is 10-3
E6 (Yellow) On when the error code of the
fiber interface>10-6
Off if the data from the fiber
27
interface is normal;
(OPT)W
(Green)
On if fiber receiving power is
normal, otherwise, is OFF
RA(Yellow) On if the peer interface fiber
disappears or LOS alarms
(E1)W
(Green)
on while connection, off
while disconnection.
Sparkles if there
exists loop-back in
E1 local equipment.
Sparkling indicates
corresponding with A
A (Yellow) On when E1 receives AIS Sparkles if there
exists loop-back
from peer E1
interface
Sparkling
corresponding with
(E1)W
FS (Red) Works under the frame
method. On if the 2M frame
losses simultaneously
Sparkles if there
exists loop-back
from peer V35
interface
Sparking corresponding
with UL
TD (Green) Sparkles when the V.35
interface sending data
RD(Green) Sparkles when the V.35
interface receiving data
UL (Yellow) On if the sending data from
V.35 is not match with the set
clock mode
Sparkles if there
exists loop-back in
V.35
Sparkling
corresponding with FS
S (Green) Ethernet interface bps:
on=100M, off=10M
28
L (Green) Ethernet interface connecting
status: on=connection,
sparkle =there are some data
input
F(Red) On if fiber receiving power is
normal, otherwise, is OFF
Sparkles if
there exists
loop-back from E1
interface
Sparkling
corresponding with A
L(Green,
upside )
Ethernet interface connecting
status: on=connection,
sparkle =there are some data
input
Sparkles if
there exists
loop-back from peer
E1 interface
Sparkling
corresponding
with(E1)W
Console: connect with the management equipment in order to
have the management function;
E1, V35 interface is in the back of the equipment;
Switch: please refer to the actual dial number
3.2 Dial-up switch
Fig 3.14 Dial-up switch definition
OFF=1
ON=0
1 2 3 4 5 6 7 81 2 3 4 5 6 7 8
29
Dial-up switch is used to set the maintaining and testing functions of
the equipment. All the maintaining and testing functions could be set
through net management.
Dial-up 1, 2 (applicable to all equipments): maintenance and test
mode choice (OFF=1, ON=0)
00= project BERT Test
01= long-distance equipment loop-back, control the
long-distance equipment E1 interface fiber loop-back, the time
limit for the loop-back is one hour
10= keep by the factory
11= normal mode
Else dial-up settings
MST30AV, KMST30AV dial-up setting
Dial-up3: No definition
Dial-up4: V.35 interface CRC choice (OFF=1、On=0)
0=function
1=prohibition
Dial-up5: V.35 interface clock phase choices
0=opposite phase
1= same phase
Dial-up 6, 7, 8:V.35 clock interface clock mode
000=DTE Mode, in term of RC, sends TD, in term of TC,
collects RD
001=DTE Mode, in term of TC, sends TD, in term of TC,
collects RD
010=DTE Mode, in term of RC, sends TD, in term of RC,
collects RD
30
011=DTE Mode, in term of TC, sends TD, in term of RC,
collects RD
100= No definition
101=DCE Mode, V.35 External clock
110=DCE Mode, E1 Slave clock
111=DCE Mode, E1 Master clock
MST30AE dial-up setting
Dial-up 3: Ethernet lengthen choices
0=1536/1536;
1=1518/1522。
Dial-up 4: Clock choices
0=Recovery clock
1=Local clock
MST30CE Dial-up setting
Dial-up 3:4 Ethernet insulation function choices
0=function
1=prohibition
Dial-up4: Clock choices(OFF=1、ON=0)
0= Recovery Clock
1=Local Clock
MST30VE, KMST30VE Dial-up setting
Dial-up3: Ethernet lengthen choices
0=1536/1536
1=1518/1522
Dial-up 4: V.35 interface CRC Function choices(OFF=
1, ON=0)
0= Function
31
1= Prohibition
Dial-up 5: V.35 interface Clock Phase choices(OFF=1,
ON=0)
0=opposite phase
1= same phase
Dial-up6, 7, 8: V.35 Clock interface Clock Mode(OFF=
1, ON=0)
000=DTE Mode, in term of RC, sends TD, in term of TC,
collects RD
001=DTE Mode, in term of TC, sends TD, in term of TC,
collects RD
010=DTE Mode, in term of RC, sends TD, in term of RC,
collects RD
011=DTE Mode, in term of TC, sends TD, in term of RC,
collects RD
100=No definition
101= DCE Mode, V.35 External Clock
110=DCE Mode, EL Slave Clock
111= DCE Mod, EL Master Clock
MST30CVE Dial-up setting
Dial-up 3: Ethernet Insulation function choices(OFF=1, ON
=0)
0=function
1=prohibition
Dial-up 4: Clock Choices(OFF=1, ON=0)
0=Recovery Clock
1=Local Clock
32
Dial-up 5: V.35 interface Clock phase choices(OFF=1, ON
=0)
0=opposite phase
1=same phase
Dial-up6, 7, 8: V.35 Clock interface Clock Mode(OFF=1,
ON=0)
000=DTE Mode, in term of RC, sends TD, in term of TC,
collects RD
001=DTE Mode, in term of TC, sends TD, in term of TC,
collects RD
010=DTE Mode, in term of RC, sends TD, in term of RC,
collects RD
011=DTE Mode, in term of TC, sends TD, in term of RC,
collects RD
100=No definition
101= DCE Mode, V.35 External Clock
110=DCE Mode, E1 Slave Clock
111=DCE Mode, E1 Master Clock
MST155M and KMST155M Dial-up setting
Dial-up 1:E1 loop route choosing(OFF=1、ON=0)
0=Test;
1=Normal。
Dial-up 2:V.35 loop route choosing(OFF=1、ON=0)
0=Test;
1=Normal。
Dial-up 3, 5~8 are same with MST30VE。
Dial-up 4:E1/V.35 data route across(OFF=1、ON=0)
33
0=E1 in route 2,V.35 in route1;
1=E1 in woute1,V.35 in route 2。
MST155MC Dial-up setting
Dial-up 1:E1 loop route choosing(OFF=1、ON=0)
0=Test;
1=Normal。
Dial-up 2:V.35 loop route choosing(OFF=1、ON=0)
0=Test;
1=Normal。
Dial-up 3, 5~8 are same with MST30CVE。
Dial-up 4:E1、V.35 data route across(OFF=1、ON=0)
0=E1 in route 2,V.35 in route1;
1=E1 in woute1,V.35 in route 2。
( K ) MST30AV time slot dial-up(only for MST30AV and
KMST30AV):dial-up 0:ON E1 is framed mode and in that case
use switch 1-3 to choose the relevant time slot; OFF E1 is
unframed mode and in that case other dip switches are unable to
work.
Chart 5.19 Time slot dial-up
34
3.3 Maintenance
3.3.1 Dial-up switchMST30 series optical transmitter and receiver support loop-back, BERT
tests, etc. through net manger or dial-up.
Control method for maintenance test
Default dial-up switch is valid at ex-work.
Net manager can select “maintenance operation by
dial-up switch” or “maintenance operation by net
manager”.
When the maintenance test is operated by net manger,
“maintenance operation by net manager” shall be
selected.
Clear power-failure through the maintenance operation
set by net manger.
3.3.2 BERT Test TheoryThe simple error monitor built in the equipment can designate the data
channel for receiving and transmission through dial-up or net manger, the
indicator light on the panel can indicate the synchronized mode, error
rating in the error test (No error, <10-3, >10-3).
35
Fig 3.15 BERT principle
Project detect is designed for transferring and receiving the data in
regular condition.
3.3.3 Test processEngineering test refers to test, and the procedure is shown as below:
11 Confirm that the on both ends function normally, and place the
local-end dial-up switch at 11
Set the end-to-end equipment’s corresponding E1 port to loop
back in the optical direction, and move the dial-up switch from 11
to 01
The loop-back setup is valid when the indicator flickers (local
end AIS flickering)
Setup at the local-end E1 channel BERT, move dial-up switch
from 01 to 00
36
3.3.4 ConfigurationsAll the configurations of MST30 series and MST155 series can be set up
via the network management software and part of the configurations can be set
up by the dip switch. Customer can open/close the DIP function via the
network management software and factory default is DIP enable.
Chart 6.1 Set-up mode configuration
Default V.35 interface configurations of MST30AV, MST155M,
MST155MC, KMST30AV and KMST155M are shown on the Chart 6.4.
Chart 6.2 MST30AV、MST155M、MST155MC、KMST30AV、
KMST155M configuration
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Chart 6.3 DTE Mode V.35 configuration
Default Ethernet interface configurations of MST30AE are shown on the
Chart 6.4
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Chart 6.4 MST30AE Configuration
Ethernet interface configuration instruction:
Flow control: whether the Ethernet interface set-up supports 802.3x flow
control protocol;
Channel isolation: choose the channel in order to separate the Ethernet
channels;
Package size: select the Ethernet interface through the max package size;
Interface set up: can select work model of Ethernet interface, that is
self-negociation,10M half-duplex, 10M full-duplex, 100M full-duplex,
100,M half-duplex, also can control the interface use through selecting
“use”, o cancel to close the interface;
Priority option: can select ”high-priority transmit proportion” and
“high-priority interface”to set up high-priority Ethernet interface.
V.35 interface configuration instruction:
Model option: select DCE/DTE model through setup, clock parameter is
different in either model;
CRC option: whether E1 framed supports CRC verification;
Send the edge of the clock: can select the edge of the clock corresponding
the equipment connected with V.35;
DCE clock type option: can select the three kinds of clock, main
clock(Jitter Clock), slave clock(E1clock recovery), external clock(V.35
interface ETC clock);
DTE clock type option: can set up the clock in data sender and receiver
respectively;
39
Time slot option: can select V.35 interface in transparent 2048K or framed
n*64k.
Note: These configurations should be made by specified configuration
software which can be asked for from our company or downloaded from
our website.
3.3.5 E1/V.35 data channel switch MST155M/C support data channel optional exchange of E1/V.35 so that
V.35 channel is easily corresponding to E1channel of remote equipment.
Network management may choose V.35 data, which take up original
channel model or choose regular E1 channel model to reach data channel
exchange of E1/V.35.
Channel across(factory default)
CH1 CH2
E1 ch2 V.35
active channel
CH1 CH2
V.35 E1 ch2
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4 Troubleshooting
4.1 Optical LOS Alarm
Check the connection between fiber and optical transmitter and
receiver;
Check if the transmiter/receiver fiber is oppositely connected;
Check the optical port of the device;
Check the optical link. Test the optical receiving power. If no
optical power, then exchange the receiving and transmitting fiber
with the corresponding terminal simultaneity and check.
4.2 E1 alerting
E1 interface WORK light is the operating light which should be
permanent on in normal status. AIS light is the alerting light when
receiving all 1 code.
WORK light is not on. Check if E1 port cable is properly
connected. Check the continuity and stretch of the connection cable.
Check if the connected client device is power on and works well.
AIS light on. Check the operating status of the connected client
device.
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4.3 Peer terminal alerting
If current terminal RA (Yellow) light is on, it means the corresponding
terminal receiving signal disappeared or synch lost. Check current
terminal optical transmitting signal and corresponding terminal receiving
signal. Check the optical link.
4.4 High bit error rate
Check if the interface impedance is properly set. If it is OK, please
connect the bit error test set to check by piecemeal, and then use POE
method to check if the error is coming from optical link or device itself.
5 Interface
5.1 Electric features of E1 interface:
Nominal rate: 2048Kbps,margin±50ppm
Interface code type: HDB3
Interface impedance: 75Ω (unbalanced) or 120Ω (balanced)
Electric features of digital interface: compliant with ITU— T G.703
recommendations
Jitter transfer performance: compliant with ITU-T G.823
recommendations
42
Input Jitter tolerance: compliant with ITU-T G.823 recommendations
Output jitter: compliant with ITU-T G.823 recommendations
Level: ±2.37V±10% or ±3.00V±10%
Interface connector: BNC coaxial
Chart 9.1 Wave model of E1 line code
5.2 Optical interface features:
Transmission optical power: -3dBm~-8dBm
Receiving sensitivity: ≤ -35dBm
43
Fiber interface: dual SC/dual FC/single SC
Applicable fiber: single-mode, multi-mode
Chart 9.2 Optical interface definition
5.3 Manage interface and extend port
features:
Interface: RS-232;
Interface connector: RJ-45;
Manage interface baud rate: 57600bit/s;
Extend max baud rate: 19200bit/s。
TX RX
GND TX RX
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Chart 9.3 RS-232 interface definition
Chart 9.4 Extend port definition
5.4 Ethernet interface features:
Interface: 10/100Base-Tx
Interface specification: compliance with IEEE-802.3u
Connector: RJ45
Bandwidth:2 M
3
TX+TX- RX+ RX-
21 6
RXGNDTXDTRCD CTS
RTS
1 2 3 4 5 6 7 8
45
Chart 9.5 Ethernet interface definition
Notice: must compliance with the standard to make Ethernetinterface line, please refer to the appendix
5.5 Electric features of V.35 interface:
interface speed:n×64K
no traffic control, transparent transmission
interface connector:DB25 slot
work mode: DCE, DTE optional
V.35 Interface Definition
(DCE mode: E1 master clock/E1 slave clock/V.35 external clock):
Pin M/34 I/O Definition Function
1 A GND Signal ground
2 P I TDA Transmit data cable A
3 R O RDA Receive data cable A
4 C I RTS Send request
5 D O CTS Send permission
6 E O DSR Data device ready
7 B GND Protected ground
8 F O DCD Data carrier detect
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9 X O RCPB Receive clock cable B
10 I Reserved
11 W I ETCB External clock cable B
12 AA O TCPB Transmit clock cable B
13 NC
14 S I TDB Transmit data cable B
15 Y O TCPA Transmit clock cable A
16 T O RDB Receive data cable B
17 V O RCPA Receive clock cable A
18 NC
19 NC
20 H I DTR Data terminal ready
21 NC
22 NC
23 I Reserved
24 U I ETCA External clock cable A
25 NC
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V.35 interface definition (DTE mode):
Pin F/34 I/O Definition Function
1 A GND Signal ground
2 R I RDA Receive data cable A
3 P O TDA Transmit data cable A
4 D I CTS Send permission
5 C O RTS Send request
6 H O DTR Data terminal ready
7 B GND Protected ground
8 O Reserved
9 W O ETCB External clock cable B
10 AA I TCPB Transmit clock cable B
11 X I RCPB Receive clock cable B
12 O Reserved
13 NC
14 T I RDB Receive data cable B
15 O Reserved
16 S O TDB Transmit data cable B
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17 U O ETCA
18 NC
19 NC
20 E I DSR
21 NC
22 NC
23 Y I TCPA Transmit clock cable A
24 V I RCPA Receive clock cable A
25 NC
5.6 Power Supply
DC voltage: -48VDC, margin: -36V~-72V
Power supply ripple: ≤240mVp-p
DC +24V: +24 V±15%
DC -24V: -24 V±15%
AC voltage: 220VAC±15% 50Hz
Power consumption: ≤10W
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5.7 Working Environment
Environmental temperature: 0℃~45℃
Relative humidity: ≤90%(35℃)
Air pressure: 86~106Kpa
5.8 Dimension
200×145×45 mm
6 Application
Application 1
MST 30A series fiber optic modem can take any signal through E1.
Following is the typical application.
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6.1 MST series Fiber Optic Modem typical application
Application 2
6.2 MST series Fiber Optic Modem typical application
Application 3
51
6.3 MST series Fiber Optic Modem typical application
6.4 MST series Fiber Optic Modem typical application
52
7 Appendix
7.1 Lines for management interface
The management interface is connected to the serial port of PC via
simplified RS232 interface, therefore simply connect the following three
signal lines: RXD, TXD and GND. See the figure below for the
corresponding relations.
7.2 Lines for Ethernet interface
Two standards for the sequence of lines of Ethernet interface EIA/TIA
568A and EIA/TIA T568B are shown as Appendix Fig. 2. When
producing RJ45 connectors, be sure to follow these standards.
Appendix Fig. 1 Production of connecting lines for management interface
456
523
RJ45 DB9PCDevic
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Appendix Fig. 2 Production of connecting lines for Ethernet interface
7.3 Lines for E1 interface
Impedance of equipment interface: 75Ω, interface: BNC coaxial.
75Ω non-balance mode, the transmission impedance of the connecting
lines are required to be 75Ω and use 75Ω coaxial cable. If the user’s
equipment is built with a coaxial interface, see Appendix Fig. 3 for the
production of connecting lines.
BNC coaxial head 75Ω coaxial cable Coaxial head matching
with the user’s equipment, connect it to the peer equipment
Appendix Fig. 3 75Ω Production of
Coaxialheadmatchingwith theuser’s
BNC 75Ω
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7.4 DC power supply
See the figure below for the rear panel of DC power supply equipment.
Appendix Fig. 4 Rear panel of power supply
For DC -48V models, -Vin to -48V, +Vin to power ground wire and GND
to protection ground wire.
GND -Vin +Vin
Appendix Fig. 3 120Ω Production of
RJ45RJ45 120Ω
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For DC +24V, -Vin to power ground wire , +Vin to +24V and GND to
protection ground;
For DC -24V, -Vin to -24V, +Vin to power ground wire and GND to
protection ground;
For DC±24 V, -Vin to -24V, +Vin to +24V and GND to protection
ground.
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