CENTRAL OFFICE INTERFACE UNIT The Central Office Interface Unit supports 4 outside (CO/PBX) lines. This card contains a fax branch connection. Loop start trunks only.
CENTRAL OFFICE INTERFACE UNIT The Central Office Interface Unit supports 4 outside (CO/PBX) lines. This card contains a fax branch connection. Loop start trunks only. Supports Caller ID.
CENTRAL OFFICE INTERFACE UNIT The Central Office Interface Unit supports 8 outside (CO/PBX) lines. The outside lines can be a combination of Loop Start or Ground Start DTMF trunks.
CENTRAL OFFICE INTERFACE UNIT with CALLER ID The Central Office Caller ID ETU detects Caller ID signals from the central office and sends them to the Main Processor. This card supports 8 outside...
EXPANSION CABINET INTERFACE Expansion Card Interface Unit(Elite 192) The Expansion ETU is installed in the B64-U20 KSU for expansion. One EXP-U10 is required per expansion KSU.