[cisco-voip] Modem passthrough issues.

[Bryan Socha]

We'll see if this works.  Quick question..  on the D channel  (:23) I
have incoming to be handled as voice.. shuld this be modem?   These are
inbound modem calls I'm trying to fix.  How does that effect voice
calls?

 

 

 

From: James Buchanan [mailto:jbuchanan at ctiusa.com] 
Sent: Thursday, October 09, 2008 2:26 PM
To: Scott Voll; Bryan Socha
Cc: cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] Modem passthrough issues.

 

There should be the line "no ccm-manager fax protocol cisco".

 

From: Scott Voll [mailto:svoll.voip at gmail.com] 
Sent: Thursday, October 09, 2008 1:23 PM
To: Bryan Socha
Cc: James Buchanan; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Modem passthrough issues.

 

double check on the MGCP Gatway page at the bottom that it's not set to
Fax Relay.

 

Scott

On Thu, Oct 9, 2008 at 9:06 AM, Bryan Socha <bryan at ugo.com> wrote:

I'm pretty sure it's the gateway, we tried dialing back and forth
internally and it was fine every time..  We ran this setup but with
different hardware (1700V routers for pstn gateways and same exact
hardware revision and image on the ata186s).

 

The region is definitely set for G.711.

 

The relevant part of the config is below with ccm IP xxx'd out..  Im
hoping I just overlooked something.  

 

!

controller T1 0/3/0

 framing esf

 linecode b8zs

 pri-group timeslots 1-24 service mgcp

!

interface Serial0/3/0:23

 no ip address

 isdn switch-type primary-5ess

 isdn incoming-voice voice

 isdn bind-l3 ccm-manager

 no cdp enable

!

mgcp call-agent XXXXXXX service-type mgcp version 0.1

mgcp dtmf-relay voip codec all mode cisco

mgcp modem passthrough voip mode nse

mgcp modem passthrough voip redundancy

mgcp package-capability rtp-package

!

mgcp profile default

 

 

 

From: James Buchanan [mailto:jbuchanan at ctiusa.com] 
Sent: Wednesday, October 08, 2008 10:28 PM
To: Bryan Socha; cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] Modem passthrough issues.

 

I would be interested to see your gateway config. I assume you have
modem passthrough enabled everywhere. Also, is your ATA in a device pool
with a region set for G711?

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Bryan Socha
Sent: Wednesday, October 08, 2008 7:18 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Modem passthrough issues.

 

We've been running a ccm setup for about 5 years now, many versions..
we've always used ata186s for faxes and modems..   We recently had a
tech refresh of the system after a lease ended and we can't get the
modems to work.  Actually there is only 1 modem we care about.  The one
for the security system.  We've never needed to give it a dedicated pots
line and would prefer to not go that route.   We are fully aware the
ata186 doesn't support modem passthrough but its always worked in the
past.

 

We're using PRI lines with 2811 routers for the pstn interface.
Everything is setup right, the modem does answer but the call drops
about 30 seconds later on its own.  Well we think on its own, we're not
sure if its just the security company software timing out, they
obviously have very little information about their side...

 

Is anyone using a 2800 series router with modem passthrough combined
with ATA186 adapters?   I'd love to know your config for the combination
of hardware.

 

Thanks,

Bryan


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