Site-Specific Option Number Setting

CAUTION: Do not perform this procedure if you are using static addressing. Perform this procedure only if you are using DHCP and the LAN administrator instructs you to do this.

Use the following procedure to set the Site-Specific Option Number (SSON).

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

Mute 7 7 6 6 # (Mute S S O N #)

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 ddd is the value of SSON.

Because it does not have a display, the 4601 IP Telephone’s Call Appearance Line indicators wink out the current SSON value. Call Appearance Line a represents the SSON’s first digit. Call Appearance Line b represents the SSON’s second digit, and Call Appearance Line a represents the SSON’s third digit. For each digit, the applicable indicator winks the number of times represented by the current SSON value 600 milliseconds on, 200 milliseconds off. An 1800 millisecond pause occurs before changing indicators. If the current value is zero, the appropriate Call Appearance Line indicator flutters five times 50 milliseconds on, 50 milliseconds off instead of winking.

After the 4601 “displays” the current SSON, 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. Enter a valid value between 128 and 255 for the SSON.

The 4601 provides feedback as you enter each digit using both Call Appearance Line indicators. The indicators alternate winking the number of times represented by the digit you press 200 milliseconds on, 50 milliseconds off. For example, if the SSON’s first digit is “2,” pressing number 2 on the dial pad causes Call Appearance Line a’s indicator to wink two times. If the second digit you press is “4,” after an 1800 millisecond pause, Call Appearance Line b’s indicator winks four times. Pressing “0” (zero) on the dial pad causes the appropriate indicator to flutter three five 50 milliseconds on, 50 milliseconds off.

Then the 4601 flashes both Message Waiting indicators 500 milliseconds on, 500 milliseconds off to indicate an entry is expected.

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

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:

All phones save the new value, and restore the user interface to its previous state.