v.35
3
7/30/2019 v.35 http://slidepdf.com/reader/full/v35 1/3 Serial Pinout Diagrams General V.35 is a partially balanced, partially single-ended interface specification. The data leads and clock leads are balanced, the handshake leads are single-ended. Most commonly used for 56kbps and 64kbps data rates. DATA LEADS CONTROL LEADS Vdc B > A A > B -3 to -25 +3 to +25 binary 1 0 1 0 signal MARK SPACE MARK SPACE function off on off on Transmitter output voltage from a balanced tranmitter indicating a MARK is +0.35Vdc for the B line, -0.2Vdc for the A line. Indication of a SPACE condition is +0.35Vdc for the A line, -0.2Vdc for the B line. Output voltage difference is 0.55Vdc. To make sense to the receiver it must be at least 0.01Vdc difference between the A line and B line. Maximum cable length depends on required speed and cable capacitance. The extremes specified are 2000ft/600m to 4000ft/1200m @ 100kbps, 300ft/90m at 10Mbps. Sync applications only, no async V.35 equipment around. More speed/distance equations: 610m @ 64 kbps. Pinning M/34 Male M/34 Female
-
Upload
gopichetty -
Category
Documents
-
view
217 -
download
0
Transcript of v.35
7/30/2019 v.35
http://slidepdf.com/reader/full/v35 1/3
Serial PinoutDiagrams
GeneralV.35 is a partially balanced, partially single-ended interface specification. Thedata leads and clock leads are balanced, the handshake leads are single-ended.Most commonly used for 56kbps and 64kbps data rates.
DATA LEADS CONTROL LEADS
Vdc B > A A > B -3 to -25 +3 to +25
binary 1 0 1 0
signal MARK SPACE MARK SPACE
function off on off on
Transmitter output voltage from a balanced tranmitter indicating a MARK is+0.35Vdc for the B line, -0.2Vdc for the A line. Indication of a SPACE condition is+0.35Vdc for the A line, -0.2Vdc for the B line. Output voltage difference is0.55Vdc. To make sense to the receiver it must be at least 0.01Vdc differencebetween the A line and B line. Maximum cable length depends on required speedand cable capacitance. The extremes specified are 2000ft/600m to 4000ft/1200m
@ 100kbps, 300ft/90m at 10Mbps. Sync applications only, no async V.35equipment around.
More speed/distance equations: 610m @ 64 kbps.
Pinning
M/34 Male M/34 Female
7/30/2019 v.35
http://slidepdf.com/reader/full/v35 2/3
Pin Signal Abbr. DTE DCE A Chassis Ground - - B Signal Ground - - C Request To Send RTS Out In D
Clear To Send
CTS
In
Out
E Data Set Ready DSR In Out F Data Carrier Detect DCD In Out H Data Terminal Ready DTR Out In J Local Loopback LL In Out K Local Test Out In L Unassigned M Unassigned N Unassigned P Send Data A TxD- Out In R Receive Data A RxD- In Out S Send Data B TxD+ Out In T Receive Data B RxD+ In Out U Terminal Timing A Out In V Receive Timing A In Out W Terminal Timing B Out In X Receive Timing B In Out Y Send Timing A In Out Z Unassigned AA Send Timing B In Out BB Unassigned CC Unassigned DD Unassigned EE Unassigned FF Unassigned HH Unassigned JJ Unassigned KK Unassigned LL Unassigned MM Unassigned NN Unassigned
Special Notes
7/30/2019 v.35
http://slidepdf.com/reader/full/v35 3/3
There seem to be two versions of the V.35 pinning. One is called V.35Winchester, the other is called V.35 Straight. One is mirrored to the other. Wedon't know how it is mirrored. This information came from a 3Com source. Their Access Builder 4000 V.35 Card interface is V.35 Straight they say. The DutchPTT supplies V.35 interface according to V.35 Winchester. Connecting these tworequires some sort of crossed cable. Crossed pinning presently unknown. If someone has more information please let us know!
There are two versions of V.35 screw locks. The US-version measures 16/10 mm(the large one), the French version measures 10/10 mm (the small one). The US-version is also known as Domestic and the French version is also calledInternational.
A - A B - B C - F F - C E - H H - E R - P T - S P - R S - T V - U X - W U - V W
-
X
