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The Adtran 4200305L1 can convert a T1 circuit of 23 bearer channels (B) + 1 data channel (D) into a PRI circuit of 24 bearer robbed bit signalling (rbs) channels and vice versa
and can support up to 100 private encryption tunnels
The upgraded version of the phone is the ShoreTel 230 which provides 3 programmable keys
these phones are not refurbished
Gigabit Ethernet
Adtran 1175006L2 Total Access 750 850 PSU Power Supply Unit Card Condition:Refurbished The Adtran 4200305L1 can convertAdtran Total Access 750 850 PSU Power Supply Unit Card 1175006L2 Description: The Adtran Total Access power supply provides 48 volts of DC power to a 1175006L2 power supply. The Adtran 1175006L2 is required for operation of the Total Access 850. The Adtran 1175006L2 features an integral ring generator. Adtran 1175006L2 Features: Required for operation of Total Access 750 850 Supports 48 VDC applications AC battery charger available for AC powered
