DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123 Issue 1
April 1997
Maintenance Object Repair Procedures
Page10-514DIOD-TRK (DIOD Trunk) [G1.2SE]
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2. PBX Off-Hook (Answer Message): Close loop
a. CO Response: Trip ringing, provide loop current
3. PBX On-Hook (Drop Message): Open Tip-Ring loop, no loop current
a. CO Response: CO g o e s to idle state (see No te )
C. Direct Inward Dialing (DID)
1. CO Applies Ringing Voltage
a. PBX Response: Detect ringing current and close loop
b. CO Response : Send DTMF digi ts
c. PBX Response: Acknowledge of Number dialed and open loop
2. PBX Off-Hook (Answer Message): Close loop
a. CO Response: Trip ringing, provide loop current
3. PBX On-Hook (Drop Message): Open Tip-Ring loop, no loop current
a. CO Response: CO g o e s to idle state (see No te )
NOTE:
CO does not normally provide an On-Hook (Disconnect) signal.