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54 4600 Series IP Telephone Release 2.2 Installation Guide
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:
Note: Perform this procedure only if the LAN Administrator instructs you to do so.
1. While the phone 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:
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 phone and the Message button LED on the
faceplate flash 500 milliseconds on, 500 milliseconds off to indicate an entry is expected.
SIG=protocol
*=change #=OK