Signaling Protocol Identifier

Use the following procedure to set or change the Signaling Protocol Identifier. A valid SIG Protocol Identifier is either 0 (default), 1 (H.323), or 2 (SIP).

NOTE: Perform this procedure only if the LAN Administrator instructs you to do so.

1. While the telephone is on-hook and idle, press the following sequence of keys on the faceplate of the telephone:

Mute 7 4 4 (Mute S I G)

NOTE: Press the Mute button momentarily. Do not press this button while pressing other keys/buttons. The 4630/4630SW IP Telephones and the 4690 IP Conference Telephone do not have a dedicated Hold button. For all other 4600 Series IP Telephones, pressing the Hold button instead of the Mute button also works.

All IP telephones except the 4601 display the following text left-justified at the top of the display:

where protocol is the telephone’s signaling protocol (H.323, SIP, or default) corresponding to the numeric identifier (1, 2, or 0).

Because it does not have a display, the 4601 IP Telephone’s Call Appearance Line a’s indicator winks out the current SIG value 600 milliseconds on, 200 milliseconds off. One wink represents H.323 and two winks represent SIP. If the current value is zero (the default), Call Appearance Line a’s indicator flutters five times 50 milliseconds on, 50 milliseconds off instead of winking. After the 4601 “displays” the current SIG value, the Message Waiting indicator at the top of the telephone and the Message button LED on the faceplate flash 500 milliseconds on, 500 milliseconds off to indicate an entry is expected.

2. To change the SIG value, press *.

Depending on the current value, the next sequential valid SIG value is selected and displayed as the protocol. For example, if the current value is SIP (2), pressing * changes the value to 0 (default). If the current value is H.323 (1), pressing * changes the value to
2 (SIP).

If a value different from the current Group value is entered, all IP telephones except the 4601 display the following text left-justified at the top of the display:

The 4601 IP Telephone instead flashes both Message Waiting indicators 500 milliseconds on, 500 milliseconds off to indicate an entry is expected.

3. Press the * button to terminate the procedure, or the # button to save the new value. If you press the # button, all IP telephones except the 4601 display the following text:

The new value is saved. All phones except the 4601 display the following text left-justified at the top of the display:

The 4601 IP Telephone instead flashes both Message Waiting indicators 500 milliseconds on, 500 milliseconds off to indicate an entry is expected.

4. Press the * (asterisk) key to terminate the procedure without restarting the telephone.

Press the # (pound) key to restart the telephone.

The remainder of this procedure depends on the status of the boot and application files.
See Appendix A: Restart Scenarios.