[cisco-voip] My providers get ISDN Cause code 44

Tue Jul 29 07:46:32 EDT 2008

Mohit,
In CCM 4.2(3) If you click on the GW configuration and then from there click on the corresponding T1/E1. From the GW Configuration submenu for the Interface there is a "Channel Selection" order under the Interface Information configurations. We had to set our's to TopDown to match the customer's PBX setting.

The fact that outgoing calls complete but incoming calls from the provider fail really points to a resource issue. Change the Channel Selection and let us know if incoming calls now complete.

Justin Kennedy
Stallion Oilfield Services
StaRComm VSAT Administrator
Cell: 432-638-6876
Office: 432-687-9420
email: jkennedy at sofs.cc

-----Original Message-----
From: Mohit Saxena [mailto:MohitS at starcomms.com]
Sent: Monday, July 28, 2008 8:20 PM
To: Mohit Saxena; Justin Kennedy; Walt Moody
Cc: cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] My providers get ISDN Cause code 44

Hello My Friend,

I have attached debug mgcp logs. The scenario is something like below:

Huawei MSC ----------Cisco AS5850--------------IP
Network---------------------Provider equipment---------ISDN

Now I am at huawei MSC or you may say at Cisco AS5850. I am able to
successfully send calls to the provider that means outgoing calls don't
have any issue.
When provider sends traffic to me, only few calls are able to terminate.
He gets cause code 44 on his switch.

How can I ensure that my outgoing calls use top up and incoming use
bottom up scheme or vice versa. Or I mean how to fix this issue.

And yes, I want to Cite out that both incoming and outgoing use the same
e1s from AS5850 to Hiuawei MSC and we have enough capacity.

Brgds,

Mohit C. Saxena
Sr. Network Administrator
Starcomms Ltd.
www.starcomms.com
Mob: +234-702-800-0709

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Justin Kennedy
Sent: Monday, July 28, 2008 11:46 PM
To: Mohit Saxena; Walt Moody
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] My providers get ISDN Cause code 44

I liked this one - was a fun one to debug when I worked it...

Common issue was insufficient DSP resources. For example, we had a T1
PRI connecting to customer's PBX. The peak usage was fewer than 6
concurrent calls. Rather than install a PVDM2-32 we used a PVDM2-8. The
customer's PBX was set to top down DS0 usage. We needed bottom top from
their PBX. It was trying to put a call on the 23rd DS0, but cisco IOS
didn't have the resources --- so it dropped the call. Once their PBX
tried the first DS0 cisco IOS knew it had resources and the call
completed.

What protocol are you using? If you're using MGCP a "debug mgcp packet"
will reveal more possible causes.

Justin Kennedy
Stallion Oilfield Services
StaRComm VSAT Administrator
email: jkennedy at sofs.cc

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Mohit Saxena
Sent: Monday, July 28, 2008 2:52 PM
To: Walt Moody
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] My providers get ISDN Cause code 44

My Friend,

I know this as this is the explanation for this cause code everywhere on
the internet. But I am looking for a solution to this or why is this
happening.

Please help

Mohit C. Saxena
Sr. Network Administrator
Starcomms Ltd.
www.starcomms.com
Mob: +234-702-800-0709

-----Original Message-----
From: Walt Moody [mailto:moody at arizona.edu]
Sent: Monday, July 28, 2008 8:45 PM
To: Mohit Saxena
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] My providers get ISDN Cause code 44

Cause Code Value 44 "Requested Circuit/Channel Not Available"
This cause is returned when the circuit or channel indicated by the
requesting entity cannot be provided by the other side of the interface.

Mohit Saxena wrote:

> Hello Friends,
>
>
>
> I have a Cisco 5850 VoIP Gateway and I receive calls from one of my
> providers over Internet. From some days, my provider has started
> complaining about LOW ASR. He has forwarded me his ISDN Disconnect
codes
> and most of the calls have Cause code 44.
>
> When I try to see any CDR for those calls on my voip gateway, I cannot

> see any traces of those calls and numbers. Please can some one help me

> about this cause code 44. Is is a problem from my side??
>
>
>
> When I try to simulate a call to those numbers from my AS5850 it goes
fine.
>
>
>
> Please help.
>
>
>
> Brgds,
>
>
>
> Mohit C. Saxena
> Sr. Network Administrator
> Starcomms Ltd.
> www.starcomms.com <blocked::http://www.starcomms.com>
> Mob: +234-702-800-0709
>
>
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DISCLAIMER:The information contained in this message (including any attachments) is confidential and may be privileged. If you have received it by mistake please notify the sender by return e-mail and permanently delete this message and any attachments from your system. Any form of dissemination, use, review, distribution, printing or copying of this message in whole or in part is strictly prohibited if you are not the intended recipient of this e-mail. Please note that e-mails are susceptible to change. STARCOMMS PLC shall not be liable for the improper or incomplete transmission of the information contained in this communication nor for any delay in its receipt or damage to your system. STARCOMMS PLC does not guarantee that the integrity of this communication has been maintained or that this communication is free of viruses, interceptions or interferences. STARCOMMS PLC reserves the right to monitor all e-mail communications, whether related to the business of STARCOMMS or not, through its internal or external networks. DISCLAIMER:The information contained in this message (including any attachments) is confidential and may be privileged. If you have received it by mistake please notify the sender by return e-mail and permanently delete this message and any attachments from your system. Any form of dissemination, use, review, distribution, printing or copying of this message in whole or in part is strictly prohibited if you are not the intended recipient of this e-mail. Please note that e-mails are susceptible to change. STARCOMMS PLC shall not be liable for the improper or incomplete transmission of the information contained in this communication nor for any delay in its receipt or damage to your system. STARCOMMS PLC does not guarantee that the integrity of this communication has been maintained or that this communication is free of viruses, interceptions or interferences. STARCOMMS PLC reserves the right to monitor all e-mail communications, whether related to the business of STARCOMMS or not, through its internal or external networks.