[cisco-voip] T1 dropoffs.

[Wes Sisk]

Peter,

A 'debug voip ccapi inout' on the 3745 should show the timer that is popping
and causing the call to be torn down.  Is the VOIP control protocol h323 or
MGCP?

Also, what is the originating VOIP device?

IPPhones do not do RTCP so the IOS gateways will timeout on non-receipt of
RTCP if "no mgcp timer receive-rtcp" is not configured in the gateway.

sample config:
http://www.cisco.com/en/US/partner/tech/tk652/tk701/technologies_configurati
on_example09186a008022eaa3.shtml

/Wes

> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net]On Behalf Of
> peter.casanave at us.army.mil
> Sent: Sunday, July 18, 2004 7:47 AM
> To: cisco-voip at puck.nether.net
> Cc: Voll, Scott
> Subject: [cisco-voip] T1 dropoffs.
>
>
> I have been stuck on this issue for a few days. I am running two
> T1 CAS interfaces off my 3745 into an unnamed military PBX. Have
> my T1s built using DS0-groups emulating ISDN switch-type of 5ESS.
> I am able to process call thru the PBX but they drop off at 50
> seconds to the "T." The weird thing is I only have this issue on
> calls originating from the VoIP side. Remote calls calling my IP
> phones work great. I was just wondering if anyone has seen this
> before. I know it my be a PBX issue.
>
> V/R,
> PETER CASANAVE
> SSG, USA
> BBN Platoon Sergeant
>
> ----- Original Message -----
> From: "Voll, Scott" <Scott.Voll at wesd.org>
> Date: Thursday, July 15, 2004 11:36 pm
> Subject: RE: [cisco-voip] Need Help Configuring Cat2924XL
>
> > Do you have to run it as a trunk on the 2924?
> >
> > Our 3550's look like this:
> >
> > interface FastEthernet0/2
> > switchport access vlan 10
> > switchport mode dynamic desirable
> > switchport voice vlan 102
> > mls qos trust cos
> > wrr-queue cos-map 1 0 1
> > wrr-queue cos-map 2 2 3
> > wrr-queue cos-map 3 4
> > wrr-queue cos-map 4 5 6 7
> > priority-queue out
> > spanning-tree portfast
> >
> > PC's connected to Phones and everything works.
> >
> > Scott
> >
> > PS.  Simon, are you using CM and what version if so?
> > I had some problems with phones on the wrong vlan until the firmware
> > upgraded on the phone.  Then they worked just fine.
> >
> > -----Original Message-----
> > From: Simon Hamilton-Wilkes [simon at jettis.com]
> > Sent: Thursday, July 15, 2004 12:27 PM
> > To: 'Anthony Mendoza'; cisco-voip at puck.nether.net
> > Subject: RE: [cisco-voip] Need Help Configuring Cat2924XL
> >
> > The voice interfaces should look something like this:
> > interface FastEthernet0/5
> > switchport access vlan 416
> > switchport trunk encapsulation dot1q
> > switchport trunk allowed vlan 415,416
> > switchport mode dynamic desirable
> > switchport voice vlan 415
> > spanning-tree portfast
> >
> >
> > Simon
> >
> > -----Original Message-----
> > From: cisco-voip-bounces at puck.nether.net
> > [cisco-voip-bounces at puck.nether.net] On Behalf Of Anthony Mendoza
> > Sent: Thursday, July 15, 2004 12:04 PM
> > To: cisco-voip at puck.nether.net
> > Subject: [cisco-voip] Need Help Configuring Cat2924XL
> >
> >
> > I've got a Cat2924XL with the following relevant config snippets:
> >
> > rwc-2924xl-131#show vlan
> > 12   DMZ                              active
> > 100  IP Phones                        active    Fa0/7
> >
> > interface FastEthernet0/5
> >  switchport voice vlan 100
> >  spanning-tree portfast
> > !
> > interface FastEthernet0/6
> >  switchport access vlan 2
> >  switchport voice vlan 100
> > !
> > interface FastEthernet0/7
> >  switchport access vlan 100
> >  spanning-tree portfast
> >
> > interface FastEthernet0/24
> >  switchport trunk encapsulation dot1q
> >  switchport mode trunk
> >
> > interface VLAN2
> >  ip address 172.16.0.131 255.255.0.0
> >  no ip directed-broadcast
> >  no ip route-cache
> >
> >
> > So...  FE0/7 works fine (as you would expect), but neither 0/5 or 0/6
> > work
> > ...  The phone sees the operational VLAN 100, but never gets an IP..
> > What
> > the heck am I doing wrong?  Cisco's docs only show the "switchport
> > voicevlan" option as being relevant.  Is there something I'm
> > missing on the
> > switch config?  I've rebooted the phones and switch a few times.
> >
> > Thanks for any help,
> > --
> > Anthony Mendoza
> >
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