cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
708
Views
0
Helpful
4
Replies

Information about channel negotiation E1

cisirunite
Level 1
Level 1

hi,

anyone knows if is it possible to negotiate an outbound ISDN b-channel between Cisco gateway 2851 and a PSTN switch of an Italian provider?

I have a Cisco router 2851 linked via E1 PRI (primary-net5) with PSTN and connected via MGCP with Cisco Call Manager v4.1.

From the debug message I note that the router choose the b-channel in esclusive mode and if, for any reasons, there is a problem on the line the call is busyout.

Thank for helping me

antonio

4 Replies 4

chadlincoln
Level 3
Level 3

Can you post the configs of the router? Thanks.

Below the lines more relevant. We have also an E1 link (via E1 0/2/0) between our gateway and our alcatel 4400 PBX.

network-clock-select 1 E1 0/0/0

network-clock-select 2 E1 0/1/0

network-clock-select 3 E1 0/1/1

network-clock-select 4 E1 0/3/0

network-clock-select 5 E1 0/3/1

isdn switch-type primary-net5

controller E1 0/0/0

pri-group timeslots 1-31 service mgcp

controller E1 0/2/0

clock source internal

pri-group timeslots 1-31 service mgcp

interface Serial0/0/0:15

no ip address

encapsulation hdlc

isdn switch-type primary-net5

isdn incoming-voice voice

isdn bind-l3 ccm-manager

isdn negotiate-bchan resend-setup

no cdp enable

interface Serial0/2/0:15

no ip address

encapsulation hdlc

isdn switch-type primary-net5

isdn protocol-emulate network

isdn incoming-voice voice

isdn bind-l3 ccm-manager

no cdp enable

!

voice-port 0/0/0:15

cptone IT

!

voice-port 0/2/0:15

cptone IT

!

ccm-manager mgcp

no ccm-manager fax protocol cisco

ccm-manager music-on-hold

ccm-manager config server xxx.xxx.xxx.xxx

ccm-manager config

!

mgcp

mgcp call-agent xxx.xxx.xxx.xxx 2427 service-type mgcp version 0.1

mgcp dtmf-relay voip codec all mode out-of-band

mgcp rtp unreachable timeout 1000 action notify

mgcp modem passthrough voip mode nse

mgcp modem passthrough voip codec g711alaw

mgcp package-capability rtp-package

no mgcp package-capability res-package

mgcp package-capability sst-package

no mgcp package-capability fxr-package

mgcp package-capability pre-package

no mgcp timer receive-rtcp

mgcp sdp simple

mgcp fax t38 inhibit

mgcp rtp payload-type g726r16 static

!

mgcp profile default

dial-peer voice 1 pots

service mgcpapp

port 0/0/0:15

paolo bevilacqua
Hall of Fame
Hall of Fame

Hi, you asked this already.

You cannot chanhe the selection using MGCP.

With H.323, you are able to.

I'm not sure if this is what you're asking, but on the MGCP page you're able to specify whether you want to do 'top-down' or 'bottom-up' on the PRI page.

-nick

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: