DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-531DIOD-TRK (DIOD Trunk)
9
2. PBX On-Hook (Drop Message): Open Tip-Ring loop, no loop current CO
Response: CO goes to idle state (see Note)
Incoming Call
1. CO Applies Ringing Voltage PBX Response: Detect ringing current
2. PBX Off-Hook (Answer Message): Close loop CO Response: Trip ringing,
provide loop current
3. PBX On-Hook (Drop Message): Open Tip-Ring loop, no loop current CO
Response: CO goes to idle state (see Note)
Direct Inward Dialing (DID)
1. CO Applies Ringing Voltage
PBX Response: Detect ringing current and close loop
CO Response: Send DTMF digits
PBX Response: Acknowledge of Number dialed and open loop
2. PBX Off-Hook (Answer Message): Close loop CO Response: Trip ringing,
provide loop current
3. PBX On-Hook (Drop Message): Open Tip-Ring loop, no loop current CO
Response: CO goes to idle state (see Note)
NOTE:
CO does not normally provide an On-Hook (Disconnect) signal.
