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The Avaya S3500 is a messaging storage server for Avaya pone systems
Adtran Atlas 550 AC Base Unit 1200305L1 with T1 Description:
The 1200288L2 does not include a back-up dial modem
The multiplexer card on the 4205290L1 includes a V
Adtran Atlas 550 PRI Channel Bank 4200305L7 Condition:Refurbished The Avaya S3500 is aAdtran Atlas 550 PRI Channel Bank 4200305L7 Description: The Adtran Atlas 550 (4200305L7) is a PRI channel bank. The 4200305L7 is designed to split a T1 or PRI connection into the separate B D channels at 64 Kb s. Each channel is sent to an individual FXS port when properly configured. Please note this system requires programming for your own use, only the hardware is included with the sale. The system can be set up for PRI or T1 operation. Adtran
