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IP Office Installation
Page 363
15-601042 Issue 20b (16 July 2009)
IP Office
System Components: Physical Ports
10.12.15 WAN Port
This type of port 37-way D-type port is found on the rear of IP406 V2 and IP412 control units, and on the rear of the
WAN3 10/100 external expansion modules. For the Small Office Edition control unit an optional WAN trunk interface card
can be fitted.
Each WAN port supports a single synchronous data connection, which can be X.21, V.35 or V.24/V.28. Selection of the
required interface is determined by the cable plugged into the WAN port when power is applied.
•
WAN ports must be clocked externally, the IP Office does not provide a clock signal. The clock signal is usually
provided by the service provider but under some circumstances (for example laser, microwave or baseband modems)
extra provision must be made by the installer.
Pin
Protocol
Description
Pin
Protocol
Description
1
X.21
Rx-B: Receive Data B.
20
X.21
Rx-A: Receive Data A.
2
X.21
Ind-A: Indicate A.
21
X.21
Ind-B: Indicate B.
3
X.21
Clk-A: Clock A.
22
X.21
Clk-B: Clock B.
4
X.21
Tx-A: Transmit Data A.
23
X.21
Tx-B: Transmit Data B.
5
X.21
Ctl-B: Control B.
24
X.21
Ctl-A: Control A.
6
X.21
Ground
25
V.35
WAN ID 0: Connect to Pin 6.
7
X.21
WAN ID 1: Connect to Pin 6.
26
V.24
Tx: Transmit Data.
8
V.24/V.35
DTR: Data Terminal Ready.
27
V.24/V.35
RTS: Request to Send.
9
V.24
Rx: Receive Data.
28
V.24
RxClk: Receive Clock.
10
V.24
TxClk: Transmit Clock.
29
V.24/V.35
RI: Ring Indicator.
11
V.24/V.35
DCD: Data Carrier Detect.
30
V.24/V.35
DSR: Data Set Ready.
12
V.24/V.35
CTS: Clear to Send.
31
–
Not used.
13
–
Not used.
32
V.35
Tx-A: Transmit Data A.
14
V.35
Tx-B: Transmit Data B.
33
V.35
SCTE-A: External Clock A.
15
V.35
SCTE-B: External Clock B.
34
V.35
V35 Gnd
16
V.35
Rx-B: Receive Data B.
35
V.35
Rx-A: Receive Data A.
17
V.35
TxClk-B: Transmit Clock B.
36
V.35
TxClk-A: Transmit Clock A.
18
V.35
RxClk-B: Receive Clock B.
37
V.35
RxClk-A: Receive Clock A.
19
V.24
CHASSIS
–
–
–
1. For the USA, only FCC Part 68 registered data circuit terminal equipment should be connected to the WAN Ports.
2. In all cases Pin 19 should be connected to the cable screen.
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