You can reset it:
**73639[MAC]## – where [MAC] is the MAC address of the phone using the 2 key for A/B/C and the 3 key for D/E/F.
The MAC address is on the back of each phone.
You can also think of it as **RENEW[MAC]##.
You can enter this at any time once the IP Phone is powered up. If you have the phone configured for "Live Dial Pad" on a CS 1000, then it must be turned off for this sequence to work.
JohnThePhoneGuy
"If I can't fix it, it's not broke!