## 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 telephone displays the following text left-justified at the top of the display:

SSON=ddd New=_

where ddd is the value of SSON.

1. Enter a valid value between 128 and 255 for the SSON.

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

Save new value? *=no #=yes

1. Press the * button to terminate the procedure, or the # button to save the new value. If you press the # button, the telephone displays the following text:

New value being saved

The telephone saves the new value, and restores the user interface to its previous state.