IP Office Port Pinouts
Note: Throughout the following, Tx = from IP Office and Rx = to IP Office.
Analog Trunk Ports (RJ45)

Pin No. | Description |
---|---|
1-3 | Do not use |
4 | Ring |
5 | Tip |
6-8 | Do not use |
Power Fail and POT Ports (RJ45)

Pin No. | Description |
---|---|
1&3 | Do not use |
2 | Connected to pin 6* |
4 | Ring |
5 | Tip |
6 | Connected to pin 2* |
7&8 | Do not use |
* Pins 2 and 6 are shorted together and, via a ‘ringer’ capacitor, connected to in 5.
DS/DT Ports (RJ45)

Pin No. | Description |
---|---|
1-3 | Do not use |
4 | Sig 1 |
5 | Sig 2 |
6-8 | Do not use |
ISDN Port - BRI (RJ45)

Pin No. | Description | Signal Direction |
---|---|---|
3 | Transmit Data (Tx-A) | ![]() |
4 | Receive (Rx-A) | ![]() |
5 | Receive (Rx-B) | ![]() |
6 | Transmit Data (Tx-B) | ![]() |
ISDN Port - PRI (RJ45)

Pin No. | Description | Signal Direction |
---|---|---|
1 | Receive (Rx-A) | ![]() |
2 | Receive (Rx-B) | ![]() |
4 | Transmit Data (Tx-A) | ![]() |
5 | Transmit Data (Tx-B) | ![]() |
LAN Port - 10/100 BaseT (RJ45)
For IP Office 403/406 the information below refers to LAN ports 1 – 7. Port 8 is switchable in software (exchanges Tx and Rx signals).
For IP412 and WAN3, both ports have the Rx and Tx connections exchanged.
Pin No. | Description | Signal Direction |
---|---|---|
1 | Receive (Rx-A) | ![]() |
2 | Receive (Rx-B) | ![]() |
3 | Transmit Data (Tx-A) | ![]() |
6 | Transmit Data (Tx-B) | ![]() |
DTE Port (25 Way or 9 Way D-Type socket)


Pin No. (25 Way) | Pin No. (9 Way) | Description | Signal Direction |
---|---|---|---|
2 | 3 | Receive Data (Rx) | ![]() |
3 | 2 | Transit Data (Tx) | ![]() |
4 | 7 | Request to Send (RTS) | ![]() |
5 | 8 | Clear to Send (CTS) | ![]() |
6 | 6 | Data Set Ready (DSR) | ![]() |
7 | 5 | Signal Ground | |
8 | 1 | Data Carrier Detect (DCD) | ![]() |
20 | 4 | Data Terminal Ready (DTR) | ![]() |
22 | 9 | Ring Indicator (RI) | ![]() |
Audio Port (3.5mm Stereo Jack Socket)

Pin No. | Description | Signal Direction |
---|---|---|
Common | Common | |
Left | Audio In - Left Channel | ![]() |
Right | Audio In - Right Channel | ![]() |
Expansion Port (RJ45 Socket)

Pin No. | Description | Signal Direction |
---|---|---|
1 | Receive (Rx-B) | ![]() |
2 | Receive (Rx-A) | ![]() |
3 | Sync-B | ![]() |
4 | Clock (Clk-B) | ![]() |
5 | Clock (Clk-A) | ![]() |
6 | Sync-A | ![]() |
7 | Transmit Data (Tx-B) | ![]() |
8 | Transmit Data (Tx-A) | ![]() |
Shield | Connected to chassis | Ground |
External Control Port (3.5mm Stereo Jack Socket)

Pin No. | Description |
---|---|
1 | Circuit 1 |
2 | Circuit 2 |
3 | 0 Volts (Ground/Chassis) |
4 | Not Connected |
5 | Not Connected |
Control Circuit | Information |
---|---|
Control Circuit 1 | Pin 2 & 3, ensure that Pin 2 is at a positive voltage with respect to Pin 3. |
Control Circuit 2 | Pin 1 & 3, ensure that Pin 1 is at a positive voltage with respect to Pin 3. |
Each circuit can be switched independently.
Switch Setting | Information |
---|---|
ON | Low resistance between Pins. |
OFF | High resistance between Pins. |
WAN Port (37 Way D-Type Socket)

Pin No. | Description | Signal Dir. | Pin No. | Description | Signal Dir. |
---|---|---|---|---|---|
1 | V11 Rx-B | ![]() | 20 | V11 Rx-A | ![]() |
2 | V11 Ind-A | ![]() | 21 | V11 Ind-B | ![]() |
3 | V11 Clk-A | ![]() | 22 | V11 Clk-B | ![]() |
4 | V11 Tx-A | ![]() | 22 | V11 Tx-B | ![]() |
5 | V11 Ctl-B | ![]() | 24 | V11 Ctl-A | ![]() |
6 | V11 Gnd | 25 | WAN ID 0 | ![]() | |
7 | WAN ID 1 | ![]() | 26 | V24 Tx | ![]() |
8 | V24 DTR | ![]() | 27 | V24 RTS | ![]() |
9 | V24 Rx | ![]() | 28 | V24 RxClk | ![]() |
10 | V24 TxClk | ![]() | 29 | V24 RI | ![]() |
11 | V24 DCD | ![]() | 30 | V24 DSR | ![]() |
12 | V24 CTS | ![]() | 31 | N/C | |
13 | N/C | 32 | V35 Tx-A | ![]() | |
14 | V35 Tx-B | ![]() | 33 | V35 SCTE-A | ![]() |
15 | V35 SCTE-B | ![]() | 34 | V35 Gnd | |
16 | V35 Rx-B | ![]() | 35 | V35 Rx-A | ![]() |
17 | V35 TxClk-B | ![]() | 36 | V35 TxClk-A | ![]() |
18 | V35 RxClk-B | ![]() | 37 | V35 RxClk-A | ![]() |
19 | CHASSIS |
Notes:
Source: Avaya documentation
1. For the USA, only FCC Part 68 registered data circuit terminal equipment should be connected to the WAN Ports.
2. * For X21, V24/28 and V35 variants, pins 7 and 25 are connected as follows:
V24/28: Pin 25 is connected to pin 6
V35: Pins 7 and 25 are connected to pin 6 Page