switching congestion

[cuneyt2020]

Hi all, system is BC12 SP5, connects to the Cisco gateway... (Route 67 below)

When staff tries to call the BC12 through the gateway , only 2 of 5 call is succesful. Cisco engineer says," pbx gives switching congestion message to our GW.

I started a tracing and decoded it..
Here is a small result of it

11.35.32.420
<- Incoming
Call Reference: #7EE
Message: SETUP
Bearer Capability
Coding Standard: CCITT
Information transfer capability: 3.1 kHz audio
Transfer mode: Circuit mode
Information transfer rate: 64 kbit/s
User information layer 1 protocol: CCITT G.711 A-Law
B-Channel: 31
Progress Indicator
Coding Standard: CCITT standardized coding
Location: Private network serving the local user
Progress Description: Origination address is non ISDN
Calling Party Number
Type of number: Unknown
Numbering plan: Unknown
Presentation indicator: Presentation restricted
Screening indicator: User-provided, verified and passed
Digits: 103690
Called Party Number
Type of number: Unknown
Numbering plan: ISDN/telephony numbering plan
Digits: 7000

11.35.32.500
-> Outgoing
Call Reference: #7EE
Message: SETUP ACKNOWLEDGE
B-Channel: 31

11.35.32.800
-> Outgoing
Call Reference: #7EE
Message: DISCONNECT
Cause: Switching equipment congestion

11.35.32.840
<- Incoming
Call Reference: #7EE
Message: RELEASE

11.35.32.860
-> Outgoing
Call Reference: #7EE
Message: RELEASE COMPLETE




<rodap:rou=67;
ROUTE DATA
ROU TYPE VARC VARI VARO FILTER
67 SL60 H'00000350 H'15580000 H'44200010 NO

END

<rocap:rou=67;
ROUTE CATEGORY DATA
ROU SEL TRM SERV NODG DIST DISL TRAF SIG BCAP
67 0110000000000010 7 0110000001 0 30 128 00151515 111100000031 001100

END


Does anybody have idea why it happens?

Rgrds

 

[kank]

Hi Cuneyt,

Can you tell about more about the topology? Do you use Cisco between 2 MD's. Are both sites BC12?

Regards...

 

[mundus]

Hi Cuneyt,

maybe you have "hanging" trunks, try to restart TLP60 in the lim where the trunk is.

 

[TripleT]

I have done a lot of integration testing with MD110 to Cisco using GateKeeper / Gateway.

Here is the MD110 Setup we use.

<RODDPEST=ALL;
EXTERNAL DESTINATION ROUTE DATA
DEST DRN ROU CHO CUST ADC TRC SRT NUMACK PRE
22 99 160610000000025010600000 0 1 0

<RODAP:ROU=ALL;
ROUTE DATA
ROU TYPE VARC VARI VARO FILTER
99 SL60 H'00000350 H'15440000 H'16600000 NO

<ROCAP:ROU=ALL;
ROUTE CATEGORY DATA
ROU SEL TRM SERV NODG DIST DISL TRAF SIG BCAP
99 111000000000001 5 2110000000 0 30 128 00151515 111100100031 101100


This is with BC11 SP13 though.

Also make sure ASPAC=223,parval=7;

Your problem maybe that the BCAP does not allow for 64K Unrestricted Digital, this is required for virtual messages.

IE If the Extn is diverted etc there is a meesage sent back to the originator to inform them of this.

Have a look at the setup of the EXTNs as they maybe trying to send the call to somewhere unknown.

 

[cuneyt2020]

Hi all,
Voice topology is like this,

Branch offices are connected to Cisco gateway(as5350)..
We have 2 central offices..
2 central offices have Md110 Bc12 SP5 with qsig connection

When a person in branch office call to central-office2, the call comes to Cisco gateway, then route 67 sends it to Central office 1 (Md110), it checks the numbering plan and sends it to Central office2 (md110)

Branch offices(with 12.2.24 IOS)>>>>>AS5350 Gateway<>>>rou67<>>>>MD110-1<>>>>Route 98>>>>>Md110-2

This "switch congestion" message also occurs when branch office dials the MD110-1
So discard the central office 2 site and route98...


to mundus; Yes you're right.. Restarting tlp60 and slp60 fixes it but after 2 or 3 hours later, same problem occurs so we need a permanent solution
What i saw in susip rou=67 is, some lines seem to be idle but busy.. May be it's related with this...(7-30 trunk is the case)

67 007-30 TL60 IDLE #00B4 BUSY
67 009-1 TL60 IDLE #00EF FREE

to triple7;
Is there any easy way to convert these route parameters to BC12?

 

[kank]

Hi cuneyt2020,

There are patches FR104045, 104127 and 104132 solving your problem. These patches are included in SP6 for BC12. Upgrading your system to SP6 will solve your problems. Easy way to convert the route parameters for BC12 use PCREGEN software. Can you do it?

 

[cuneyt2020]

Hi kank,
after installing patches, if the problem is still not fixed, i can try the new rodap and rocap.
I make our local vendor convert it with PCREGEN.

Thanks a lot.
Rgrds.

 

[mundus]

Hello,
there is one more patch which is not included in sp 6 ( maybe in sp 7 ), the patch is S105006A in SLP 60.

 

[cuneyt2020]

Problem still occurs or some of routes after SP6 installation .. But it doesn't occur for some.. (qsig trunks are having problems and euro isdn ones are not.) This situation was also same before SP6 installation. I mean nothing changed.

Rgrds.

Routes which are not having idle -busy trunks:
[tt]
<RODAP:ROU=1;
ROUTE DATA
ROU TYPE VARC VARI VARO FILTER
1 SL60 H'00000310 H'14400000 H'040140E0 NO

END

<ROCAP:ROU=1;
ROUTE CATEGORY DATA
ROU SEL TRM SERV NODG DIST DISL TRAF SIG BCAP
1 7110000000000010 4 2101100001 0 30 128 00151515 011100000031 111101

END


<RODAP:ROU=68;
ROUTE DATA
ROU TYPE VARC VARI VARO FILTER
68 SL60 H'00000300 H'00000000 H'04310000 NO

END

<ROcAP:ROU=68;
ROUTE CATEGORY DATA
ROU SEL TRM SERV NODG DIST DISL TRAF SIG BCAP
68 0110000000000010 4 2000030000 0 30 128 00151515 111110000030 001100

END

*************************************************************************************************************************

Routes, which are having idle -busy trunks: (We should restart PU SLP60 and TLP60 to fix it)



<ROCAP:ROU=90;
ROUTE CATEGORY DATA
ROU SEL TRM SERV NODG DIST DISL TRAF SIG BCAP
90 0110000000000010 7 3110000001 0 30 128 00151515 111100000031 001100

END

<RODAP:ROU=90;
ROUTE DATA
ROU TYPE VARC VARI VARO FILTER
90 SL60 H'00000350 H'15580000 H'46400010 NO

END

<rodap:ROU=98;
ROUTE DATA
ROU TYPE VARC VARI VARO FILTER
98 SL60 H'00000350 H'15580000 H'46400010 NO

END

<rocap:ROU=98;
ROUTE CATEGORY DATA
ROU SEL TRM SERV NODG DIST DISL TRAF SIG BCAP
98 0110000000000010 7 3110000001 0 30 128 00151515 111100000031 001100

END


<cadap;
CALENDAR DATA
IDENTITY=YKB-GEBZE
VERSION=CXP1010101/2/BC12SP5/R2A
16:46:22
FRI 24 DEC 2004
END

<susIP:ROU=90,TRU=all;
STATUS INFORMATION AT 16:46:29 24DEC04
ROU TRU TYPE TRAFFIC STATE/PTR LINE STATE/PTR ADD INFO
90 010-1 TL60 IDLE #00D1 FREE #00E1
90 010-2 TL60 SPEECH #00D0 BUSY #00E0
90 010-3 TL60 SPEECH #00CF BUSY #00DF
90 010-4 TL60 SPEECH #00CE BUSY #00DE
90 010-5 TL60 IDLE #00CD BUSY #00DD
90 010-6 TL60 SPEECH #00CC BUSY #00DC
90 010-7 TL60 CALTER #00CB BUSY #00DB
90 010-8 TL60 SPEECH #00CA BUSY #00DA
90 010-9 TL60 IDLE #00C9 BUSY #00D9
90 010-10 TL60 SPEECH #00C8 BUSY #00D8
90 010-11 TL60 IDLE #00C7 BUSY #00D7
90 010-12 TL60 SPEECH #00C6 BUSY #00D6
90 010-13 TL60 IDLE #00C5 BUSY #00D5
90 010-14 TL60 SPEECH #00C4 BUSY #00D4
90 010-15 TL60 IDLE #00C3 BUSY #00D3
90 010-16 TL60 SPEECH #00C2 BUSY #00D2
90 010-17 TL60 SPEECH #00C1 BUSY #00D1
90 010-18 TL60 SPEECH #00C0 BUSY #00D0
90 010-19 TL60 IDLE #00BF BUSY #00CF
90 010-20 TL60 IDLE #00BE FREE #00CE
90 010-21 TL60 IDLE #00BD FREE #00CD
90 010-22 TL60 IDLE #00BC BUSY #00CC
90 010-23 TL60 IDLE #00BB FREE #00CB
90 010-24 TL60 IDLE #00BA BUSY #00CA
90 010-25 TL60 CALTER #00B9 BUSY #00C9
90 010-26 TL60 IDLE #00B8 BUSY #00C8
90 010-27 TL60 IDLE #00B7 BUSY #00C7
90 010-28 TL60 IDLE #00B6 BUSY #00C6
90 010-29 TL60 IDLE #00B5 BUSY #00C5
90 010-30 TL60 SPEECH #00B4 BUSY #00C4


[/tt]

 

[mundus]

Hello,
the patch S105006A will fix the problem.