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The Inter-Tel 550
The Adtran 1200338L1 is a module for Atlas 800 series devices that adds support for eight FXS interfaces to an Atlas 800
Inter-Tel 770
Adtran T3SU 300 T3 Quad DSX-1 Interface Module 1200284L1 Description:
The switching module supports auto MDI/MDIX crossover and auto negotiation (10/100 Mbps
Adtran Atlas 550 Dual T1 PRI Module 1200314E2 Routers The Inter-Tel 550Adtran Atlas 550 Dual T1 PRI Module 1200314E2 Description: The Adtran 1200314E2 is a dual port T1 card for the Adtran Atlas 550. This module allows for a pair of ports that can be configured independently as a PRI or T1 circuit. The module supports drop insert and digital access cross connect systems (DACS) applications. Numerous configurations such as frame relay emulation and passthrough and PRI switching are supported with the Adtran 1200314E2
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