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 4 outside (CO/PBX) lines. This card contains a fax branch connection. Loop start trunks only.
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...