Max. Duration call / Hanged Lines : 9 Hrs 55 Mins

[singhbrindisi]

Dear All,

I am facing a continuous problem of hanged lines on my 2W trunks.... Lines gets stucked up & releases only if i do a restart on PU or after 9 Hrs 55 mins...

Can someone pls advice where is this duration specified & how to manipulate this figure or any other alternative way to specify max duration on a TLP11 trunk (without having metering 12/16 Khz signal from PSTN)..

Thanks & Regards,


""The truth about action must be known and the truth of inaction also must be known; even so the truth about prohibited action must be known. For mysterious are the ways of action""

 

[Hitechbuzz]

Hi Singbrindisi
The question to ask is why are your lines not releasing is it only on certain trunks is on i/c calls or o/g calls or either. Can you reproduce the fault.Is the MD looking for a loop disconect or a reversal what do you get from your Teleco? You are assuming it is your problem but it may not be. Do some tests till you can reproduce the fault then you will know where the problem is.
Cheers

Cheers Brian
To see is to know To Know is to see

 

[singhbrindisi]

Hi,

Thanks for your reply..

Problem appear occassionally on O/G calls but always on my TL11 route...

I have TL30 & TL60 routes & those works without any problem...

Here is the printout during the problem: Traffic state is speech & line is busy but actually its not in the real situation...
For these two routes: I am using GSM interfaces & connected SIM cards with our MD using TLU75...
Route parameters are attached to give you an insight..

BR,

<susip:rou=133,tru=all;
STATUS INFORMATION AT 14:47:53 28SEP05
ROU TRU TYPE TRAFFIC STATE/PTR LINE STATE/PTR ADD INFO
133 001-1 TL11 SPEECH #005C BUSY #00B3
END

<ctDEI:equ=1-3-62-06;
CALL TRACE
INITIATED ON EQU: 001-3-62-06
DEVICE TYPE TL11 PTR: H'005C
MP-IN EQU MP-OUT EQU DEV EQU DEV DIR EQU

TL11 ***** 001-3-62-02
EXECUTED
<susip:rou=133,tru=all;
STATUS INFORMATION AT 14:48:32 28SEP05
ROU TRU TYPE TRAFFIC STATE/PTR LINE STATE/PTR ADD INFO
133 001-1 TL11 SPEECH #005C BUSY #00B3
END

<susip:rou=176,tru=all;
STATUS INFORMATION AT 14:48:36 28SEP05
ROU TRU TYPE TRAFFIC STATE/PTR LINE STATE/PTR ADD INFO
176 001-1 TL11 IDLE #0060 FREE #00B7
176 001-2 TL11 IDLE #005F FREE #00B6
176 001-3 TL11 SPEECH #005E BUSY #00B5
176 001-4 TL11 IDLE #005D FREE #00B4
END

<ctDEI:equ=1-3-62-02;
CALL TRACE
INITIATED ON EQU: 001-3-62-02
DEVICE TYPE TL11 PTR: H'005E
MP-IN EQU MP-OUT EQU DEV EQU DEV DIR EQU

TL11 ***** 001-3-62-06
EXECUTED
<ctDEI:equ=1-3-62-06;
CALL TRACE
INITIATED ON EQU: 001-3-62-06
DEVICE TYPE TL11 PTR: H'005C
MP-IN EQU MP-OUT EQU DEV EQU DEV DIR EQU

TL11 ***** 001-3-62-02
EXECUTED
<rfpui:unit=tlp11,lim=1;
RFPUI:UNIT=TLP11,LIM=1;
SURE? (YES/NO)
<y;

RESTART PROGRAM UNIT
LIM STARTED PU:S FAILED PU:S
1 TLP11

EXECUTED

<susip:rou=133,tru=all;
STATUS INFORMATION AT 14:49:10 28SEP05
ROU TRU TYPE TRAFFIC STATE/PTR LINE STATE/PTR ADD INFO
133 001-1 TL11 IDLE #005C FREE #00B3
END

<susip:rou=176,tru=all;
STATUS INFORMATION AT 14:49:15 28SEP05
ROU TRU TYPE TRAFFIC STATE/PTR LINE STATE/PTR ADD INFO
176 001-1 TL11 IDLE #0060 FREE #00B7
176 001-2 TL11 IDLE #005F FREE #00B6
176 001-3 TL11 IDLE #005E FREE #00B5
176 001-4 TL11 IDLE #005D FREE #00B4
END

<rocap:rou=176&133;
ROUTE CATEGORY DATA
ROU SEL TRM SERV NODG DIST DISL TRAF SIG BCAP
176 7110001000000010 5 3101100000 0 30 128 00111105 011111000000 001100
133 7110001000000010 5 3101100000 0 30 128 00111105 011111000000 001100

END

<rodap:rou=176&133;
ROUTE DATA
ROU TYPE VARC VARI VARO FILTER
176 TL11 H'00000012 H'00000118 H'00002815 NO
133 TL11 H'00000012 H'00000118 H'00002815 NO

END

<

""The truth about action must be known and the truth of inaction also must be known; even so the truth about prohibited action must be known. For mysterious are the ways of action""

 

[whosrdaddy]

simple call case :
call a GSM via rou 176
take second access
call a GSM via rou 133

transfer those two calls (so we have trunk to trunk call)
disconnect GSM's
you'll see that TL11 trunks are still in speech on both routes.
the real problem here is that we don't have any clearing signal here because we have to trunks here.

solutions :

prevent these type of call cases via traffic matrix (same should be true for 2 calls made via the same route)
see if the GSM interface supports polarity reversal for clearing signal.

Cheers,
Daddy

-----------------------------------------------------
What You See Is What You Get
Never underestimate tha powah of tha google!

 

[patcher]

Check if you have b answer and clear signal on your analog trunks. Its easy to test using your voltmeter. Put your probe across the line and do a test call. Be sure you have the right line characteristics against your route data.

 

[singhbrindisi]

Dear All,

Thanks for your valuable & informative posts.

On GSM interface i have two settings:
Polarity Reversal & loop interrupt.

As per Patcher's suggestion: Using volmeter i can see the changes only on disconnection of call..

As advised I reduced Loop Interrupt time( During Disconnection) to 100ms instead of default time of 500ms..
No changes were made in Polarity reversal time as nothing reflected on the voltmeter during the connection of call.

Trunks are under observation after the changes...


Thanks & BR,

""The truth about action must be known and the truth of inaction also must be known; even so the truth about prohibited action must be known. For mysterious are the ways of action""