Elizabeth Miller, TC Amanda Cornwell, TC Writing in Elementary Grades Session I - Grades (K-3)
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Transcript of I tc
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ZTE University univ.zte.com.cn univ.zte.com.cnThe information contained in the file is solely property of ZTE corporation. Any kind of disclosing without permission is prohibited.
Welcome to ZTE University
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iTC Overview
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iTC Service Networking
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Purposes of applying iTC in the network are: Save Transmission resources Share Transcoder resources among iBSCs Improve the utilization rate of TCU
resources Flex Ater/A interfaces provide disaster
recovery.
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Interface Indices
A-interface uses the following media:
1. E1-link - 256-1 / 768-2 / 1024-3 / 1536-4
2. STM1-link – 4-1 /12-2 / 16-3 /24
A-ter interface uses the following media:
1. E1-link – 64 -1 / 192-2 / 256-3 / 384 - 4
2. STM1-link – 1-1 / 3-2 / 4 - 3 / 6-4
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ZXG10 iTC System Composition
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Hardware Structure of ZXG10 iTC
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iTC Shelves Description
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iTC Shelf Configurations
Control Shelf is configured in the second shelf of the third cabinet if needed. For one or two Cabinet iTC configurations, control shelf’s boards are distributed in other shelves. Packet Switching Shelf and Circuit Switching Shelf should be configured in the fourth and first shelves respectively.
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Connection Description
Clock Distribution of Combined Cabinet
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Ethernet Connections of Combined Cabinets
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User Plane connections of combined cabinet (GLI)
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User Plane connections of combined cabinet (TFI)
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iTC External Connections
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Structure of Resource Shelf
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Structure of Circuit Switching Shelf
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Structure of Packet Switching Shelf
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Structure of Control Shelf
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External Interfaces
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Clock Distribution
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User Plane Signaling flow
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Control Plane Signaling flow
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Service Networking
A-ter Interface Networking A-interface Networking
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Maintenance System Networking
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Configuration principles
System configuration principles for Ater interface TDM access modes are:
iTC supports 1 to 4 Rack configurations One SPB supports 128 no.7 Signaling. There are 2
SPB boards that can process 256 no.7 signaling. Resource shelf = AIU + TCU + Ater
2 Resource shelves = one PRCBU
System capacity expansion is very easy, only needs to stack PRCBU
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Contd..
For Full rate Ater GUP can process 3360 voice channels.
For Half rate, Ater GUP can process 4200 voice channels.
Normally average value supported by Ater Gup is 3600 voice channels.
TC GUP supports 840 Traffic channels (14 DSP x 60)
Multiplexing ratio for cabling E1 or STM-1 Interface at Ater-interface is 1:4 for FR; 1:8 for HR.
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iTC System Configuration (Ater Interface TDM)
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Example to calculate no. of boards required in One PRCBU
1 PRCBU = 2 shelvesTo support 1024 Trx,At A-interface, 256 E1 required ie 8 DTBAt A-ter, 64 E1 required ie. 2 DTBTotal= 10 DTB.One TC GUP supports, 840 TCsFor 1024 TRX, 8192 TCs ie 10 GUPs At Ater- 8192/4 =2048 TCs=3 GUPsTotal =13 GUPs.
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Detailed System Configuration.
iTC can have a maximum of 4 Racks in various configurations according to different situations such as Ater uses E1 or STM-1 and A-interface uses E1 or STM-1.
Integrated T-Network and Integrated IP switch are mutually inclusive in iTC configuration ie either use both or none
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Detailed System Configuration
Dual Shelf iTC Stack Configuration
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Single Rack Configuration (A/Ater uses E1)
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Dual Rack configuration( Ater/A-interface uses E1 )