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IP Office Installation
Page 366
15-601042 Issue 20b (16 July 2009)
IP Office
10.12.18 X.21 WAN Cable
This cable is used for connection from an IP Office 37-way D-type WAN port to the X.21 service providers equipment.
IP Office
WAN Port
Signal
Wires
X.21 WAN
Service
1
Rx-B: Receive B.
Twisted Pair
11
20
Rx-A: Receive A.
4
4
Tx-A: Transmit A.
Twisted Pair
2
23
Tx-B: transmit B.
9
24
Ctl-A: Control A.
Twisted Pair
3
5
Ctl-B: Control B.
10
2
Ind-A: Indicate A.
Twisted Pair
5
21
Ind-B: Indicate B.
12
3
Clk-A: Clock A.
Twisted Pair
6
22
Clk-B: Clock B.
13
6
Ground
------
8
•
At the IP Office end pin 7 is connected to pin 6.
•
At the IP Office end pin 19 is connected to the Screened Cable Drain
Wire.
•
Supply: This cable is not supplied with the control unit or WAN3 module. It must be ordered separately.
•
SAP Code: 700213408.
•
Cable: 6 twisted pair screened cable - each core is 7/0.203mm (24 AWG) tinned copper stranded wire, nominal
capacitance of 98pF/m, impedance of 77ohms at 1MHz, screened with aluminized tape and a tinned copper wire drain.
•
Maximum Length: 5m/16'5''. This is the maximum length that should be used if the above cable is replaced with an
alternate cable.
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