Trunks Not Releasing Calls When Disconnected

[Realign]

Good Afternoon All,
I respectfully request your assistance once again. When I call into a backend number (auto-attendant) I receive the standard, please enter the extension followed by the pound key greeting. Once an extension is entered, if I hang up the phone, the call continues to ring for 3 times. If answered, it is nothing but dead air. So the system believes the call is still active and continues to push it to the extension even after the originator has disconnected. Since these are ground-start lines, the LEC is not pushing any disconnect supervision. I have contacted them, and they can see the call originating, then immediately see the disconnect (if I hang up), but the system continues to ring as previously stated. Below are the current trunk configurations. Any suggestions would be greatly appreciated.


Group Number: 10 Group Type: co CDR Reports: y
Group Name: COR: 11 TN: 1 TAC: 716
Direction: two-way Outgoing Display? n
Dial Access? y Busy Threshold: 60 Night Service: 4804
Queue Length: 0 Country: 1 Incoming Destination: 4180
Comm Type: voice Auth Code? n Digit Absorption List:
Prefix-1? n Trunk Flash? n Toll Restricted? y

TRUNK PARAMETERS
Trunk Type: ground-start
Outgoing Dial Type: tone Cut-Through? n
Trunk Termination: rc Disconnect Timing(msec): 500

Auto Guard? n Call Still Held? n Sig Bit Inversion: none
Analog Loss Group: 6 Digital Loss Group: 11
Trunk Gain: high

Disconnect Supervision - In? y Out? n
Answer Supervision Timeout: 10 Receive Answer Supervision? n

TRUNK FEATURES
ACA Assignment? n Measured: both
Maintenance Tests? y
Data Restriction? n

Abandoned Call Search? n
Suppress # Outpulsing? n

Charge Conversion: 1
Decimal Point: none
Currency Symbol:
Charge Type: units Receive Analog Incoming Call ID: disabled
Per Call CPN Blocking Code:
Per Call CPN Unblocking Code:

Outgoing ANI: Ds1 Echo Cancellation? n



ADMINISTRABLE TIMERS
Send Incoming/Outgoing Disconnect Timers to TN465 Ports? n
Incoming Disconnect(msec): 500 Outgoing Disconnect(msec): 500
Outgoing Dial Guard(msec): 1600
Incoming Glare Guard(msec): 1500 Outgoing Glare Guard(msec): 1500


Ringing Monitor(msec): 5200 Incoming Seizure(msec): 500
Outgoing End of Dial(sec): 10 Outgoing Seizure Response(sec): 5
Programmed Dial Pause(msec): 1500 Disconnect Signal Error(sec): 240
Flash Length(msec): 540



END TO END SIGNALING
Tone(msec): 350 Pause(msec): 150

OUTPULSING INFORMATION
PPS: 10 Make(msec): 40 Break(msec): 60 PPM? n

ATMS THRESHOLDS
TTL Type: 105-w-rl Far End Test No:
TTL Vendor: TTL Contact:
Trunk Vendor: Trunk Contact:
Trunk Length:
MARGINAL UNACCEPTABLE
Min Max Min Max
1004 Hz Loss: -2 21 -2 21

-Dev +Dev -Dev +Dev
404 Hz Loss: 65527 9 65527 9
2804 Hz Loss: 65527 9 65527 9

Maximum C Message Noise: 55 55
Maximum C Notched Noise: 74 74
Minimum SRL-HI: 0 0
Minimum SRL-LO: 0 0
Minimum ERL: 0 0

Allow ATMS Busyout, Error Logging and Alarming? n

 

[phonesrus]

Ground start by it's base definition has a positive disconnect feature built in, but I think the PBX is being fooled. Try increasing the disconnect timer to 700 ms under the trunk parameters section, and if that doesn't cure the issue stroke "receive answer supervision" to (Y)es
Some CO switches have different timer settings, if you can determine what type the serving CO is, that will help, or find out what timing they are looking for or expecting.
Also, are these copper based or riding on a T-1 circuit??

 

[wilsontec]

when using analog co line ,auto-attendent perfer use monitor transfer to extension than blind transfer , because when nobody answer call can back to auto-attendent and drop the call.