A few blocks away from the Avaya Corporate Headquarters in Santa Clara is a Sheraton in Sunnyvale which has an Avaya Telephone system. This phone was spotted at the entrance to the hotel restaurant.
This phone appears to have the monochromatic display of the 9608 set, not the color 9611G which looks similar. Even though it’s monochromatic, it’s quite bright and crisp.
According to my friend who is an IP Office engineer directly for Avaya, this phone supports both SIP and H.323 protocol and can work on an Avaya IP Office or a larger Avaya Aura PBX system. He said it is generally considered an IP replacement set for a 7406, 8410 or 6408 digital set.