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digital signal level 3 (DS3)
Web Browser Graphical User Interface
Adtran NetVanta 1544 Gigabit Switch 1700544G1 Description:
Dual DC Power Supplies
The 1202820G1 is the newest version of the NetVanta 3430
ESI 60 Key Expansion Console (5000-0234) Switches digital signal level 3 (DS3)ESI 60 Key Expansion Console Description: The ESI 60 key expansion console is an add on module specifically designed for ESI 48 key phones. The ESI 60 key expansion console is compatible with the X Class, E Class, and S class phone systems. The 60 Key EC is especially useful to telephone operators or call center supervisors that need the ability to transfer to any phone extension with the press of a button. The ESI 60 add on module provides an
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