Adtran Atlas 550 Dual T1/PRI Module 1200314L1 Condition:New and has a firewall built

and has a firewall built into the unit

Adtran NetVanta 1000BaseSX SFP 1200480E1 Features:

048 Mbps operation across each of the 4 ports

Full or Fractional

In addition to programming the buttons as lines

Adtran Atlas 550 Dual T1/PRI Module 1200314L1 Condition:New and has a firewall builtAdtran Atlas 550 Dual T1 PRI Module 1200314L1 Description: The 1200314L1 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 of configurations such as frame relay emulation and passthrough and PRI switching are supported with the interface card. Adtran