Nortel M522 Expansion Module (Black/Refurbished) Sprint Protege

Nortel M522 Expansion Module (Black/Refurbished) Sprint ProtegeThe Nortel M522 Expansion Module is compatible with the M5216 and M5316 phones. It adds 22 buttons with LCD Indicators. Two expansion modules may be used with those phones.

Message-waiting indicator lets you know at a glance if you have a new message in your voice mailbox

The Avaya Definity TN790B is very similar to the TN790

Six programmable backlit line/feature buttons

Works with the Inter-Tel Axxess System

up to 21 hours of message storage

The Partner ACS 2-Slot Carrier allows Partner ACS processor to connect to an additional expansion module and is compatible with 308EC

Voice Mail does not reduce System Capacity

Nortel BCM GATM8 8 Port Caller ID Trunk Media Bay Module provides 8 lines of caller identification on the Nortel BCM 200 and or BCM 400 phone systems

Mnfr Part #: 60026

Up to 8 ports can be used for ASAI links

The NEC Aspire 0890043 phone works with:

Each trunk transmits data at 64 kbps common channel or 56 kbps Robbed Bit Signaling