[cisco-voip] UK PRI MGCP

Thu Mar 19 12:54:44 EDT 2015

Another option could be to see if your telco can help. My telco limits the number of simultaneous calls to how ever many channels I pay for, but they actually allow calls to come in or out of any channel as long as the simultaneous limit isn’t exceeded.

Nice thing about this method is it doesn’t require any special config in gateway nor CUCM. If the telco limit gets hit, CUCM treats it the way an exhausted route list would normally get treated. This seems to actually be my telco’s normal method as I did not specifically request for it.

-mn

From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of ??
Sent: March-17-15 10:56 PM
To: VoiceNoob
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] UK PRI MGCP

Sorry to dig a very old thread.
Is this method support today? Is it still limited to like maximum 5 field where we can put them into maintenance mode?

On Thu, Dec 3, 2009 at 11:36 PM, VoiceNoob <voicenoob at gmail.com<mailto:voicenoob at gmail.com>> wrote:
No you have done some tweaks somewhere to make a partial PRI work with MGCP. It does not work correctly without some changes.

It may be supported by TAC but not supported  by CUCM. ☺

From: cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net> [mailto:cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net>] On Behalf Of Lewis, Chris
Sent: Thursday, December 03, 2009 8:52 AM
To: Charles Goldsmith; Joe Martini (joemar2)

Cc: cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] UK PRI MGCP

To let you know, I have been using 15 channels on an ISDN30 for over 2 years - in my UK site - with no additional tweaks on CCM or the VGW’s

Plus it is supported by TAC – Spoken to Joe a few times I in the past  ☺

Chris

From: cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net> [mailto:cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net>] On Behalf Of Charles Goldsmith
Sent: 03 December 2009 14:36
To: Joe Martini (joemar2)
Cc: cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] UK PRI MGCP

Note: Cisco CallManager does not support the configuration or use of a fractional PRI when you use it with MGCP. If fractional PRI is necessary, you can use H.323 instead of MGCP.

This can be found on http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186a00806fedbe.shtml#topic1

It's not supported and won't work without some tweaking.

Charles
On Thu, Dec 3, 2009 at 8:34 AM, Joe Martini (joemar2) <joemar2 at cisco.com<mailto:joemar2 at cisco.com>> wrote:
To do a fractional MGCP T1/E1/PRI you have to configured it as a full PRI on the gateway.  Then on CUCM check the CallManager service parameter, Change B-Channel Maintenance Status.

Joe

From: cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net> [mailto:cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net>] On Behalf Of Dan Greenway
Sent: Thursday, December 03, 2009 9:25 AM
To: cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] UK PRI MGCP

I didn't think you could do MGCP with fractional E1's

thanks
Dan

On 3 Dec 2009, at 07:10, afatsum wrote:

You are missing l3 backhaul binding to ccm-manager under your serial
interface. Add "isdn bind-l3 ccm-manager" under serial 0/0/0:15

-Mus

Martin Bufton wrote:

I have a Cisco router connected to UK PRI E1 with 10 channels. I
cannot get it to register.

I get the following MCGP debug message. Can you see anything wrong in
my config?

000073: *Dec  2 17:55:59.251 GMT:
//-1/xxxxxxxxxxxx/MGCP/mgcp_mp_get_not_entity(830):[lvl=2]Invalid
parameter (pkt 0x67654638 pkt->mgcp_parm_lines 0x00000000)

Thanks in advance

Current configuration : 8969 bytes

!

version 12.4

no service pad

service timestamps debug datetime msec localtime show-timezone

service timestamps log datetime msec localtime show-timezone

service password-encryption

service sequence-numbers

!

hostname Cent-xxx-MGCP-GW1-RT

!

boot-start-marker

boot-end-marker

!

card type e1 0 0

logging buffered 51200 warnings

!

no aaa new-model

clock timezone GMT 0

clock summer-time BST recurring last Sun Mar 2:00 last Sun Oct 2:00

network-clock-participate wic 0

dot11 syslog

!

!

ip cef

!

!

no ip bootp server

no ip domain lookup

ip domain name

multilink bundle-name authenticated

!

isdn switch-type primary-net5

voice-card 0

no dspfarm

!

crypto pki trustpoint TP-self-signed-2117350501

enrollment selfsigned

subject-name cn=IOS-Self-Signed-Certificate-2117350501

revocation-check none

rsakeypair TP-self-signed-2117350501

       quit

!

!

archive

log config

 hidekeys

!

!

controller E1 0/0/0

pri-group timeslots 1-10,16 service mgcp

!

controller E1 0/0/1

!

ip tcp synwait-time 10

!

!

!

!

interface Port-channel1

description EtherChannel to Cent-xxx-Core-Sw

ip address 172.16.xx.100 255.255.255.0

!

interface GigabitEthernet0/0

description Member of Etherchannel conected to Cent-xxx-Core-Sw gig
2/0/19

no ip address

duplex auto

speed auto

media-type rj45

channel-group 1

!

interface GigabitEthernet0/1

description Member of Etherchannel conected to Cent-xx-Core-Sw gig 1/0/19

no ip address

duplex auto

speed auto

media-type rj45

channel-group 1

!

interface Serial0/0/0:15

no ip address

encapsulation hdlc

isdn switch-type primary-net5

isdn incoming-voice voice

no cdp enable

!

ip forward-protocol nd

ip route 0.0.0.0 0.0.0.0 Port-channel1 172.16.xx.1

!

!

ip http server

ip http access-class 23

ip http authentication local

ip http secure-server

ip http timeout-policy idle 60 life 86400 requests 10000

!

control-plane

!

voice-port 0/0/0:15

!

ccm-manager mgcp

!

mgcp

mgcp call-agent 172.16.x.10 service-type mgcp version 1.0

!

mgcp profile default

!

dial-peer voice 1 pots

service mgcp

destination-pattern 9T

incoming called-number ....

direct-inward-dial

!

!

!

scheduler allocate 20000 1000

ntp server 172.16.74.30

!

end

* *

*Martin Bufton BSc (Hons), CCNA - *Systems Engineer**

* *

------------------------------------------------------------------------

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