- Two VOIP telephone lines served by two Cisco SPA-122 boxes
- Each SPA-122 connects to separate Line 1 and Line 2 junctions in the house basement
- A single, 2-wire cable connects a wireless telephone to Line 1
- A single, 4-wire cable connects a 2-line desk telephone to Line 1 and Line 2
Inbound calls on Line 2 will ring Line 1 once and display the CID on the wireless telephone during the CID cycle.
In other words, BOTH Line 1 and Line 2 ring and display CID on inbound calls to Line 2.
The Line 1 wireless telephone only rings once, even as the line continues to ring Line 2 on the desktop phone.
Completely disconnecting the Line 1 SPA-122 from the circuit. Problem happens.
Completely disconnecting the desk telephone, down to disconnecting the wires from the wall jack. Problem happens.
Completely disconnecting the 4 wire cable that supplies the desk phone from the basement junction box. Problem does not happen.
Connected a new length of 4 wire cable to the junction box and tested with it still wound on the spool, leading no where. PROBLEM HAPPENS.
It's as if inbound calls on Line 2 are jumping / inducting cross-copper to Line 1 and ringing the wireless phone! Is this possible? How can it be fixed?