09-26-2007 12:49 PM - edited 03-14-2019 11:45 PM
Does MGCP support Fractional PRIs now?
I know it wasn't before, is there a recent IOS version or something?
09-26-2007 03:29 PM
I should have said fractional PRI WORKAROUND instead
http://puck.nether.net/pipermail/cisco-voip/2007-May/022891.html
I haven't tried this yet, you might have to waste DSPs on this.
09-26-2007 11:22 PM
Workround, (c3825-spservicesk9-mz.124-12.bin)
network-clock-participate wic 0
network-clock-participate wic 1
!
!
isdn switch-type primary-net5
!
controller E1 0/0/0
pri-group timeslots 1-8,16 service mgcp
!
controller E1 0/1/0
pri-group timeslots 1-13,16 service mgcp
!
ccm-manager fallback-mgcp
ccm-manager redundant-host x.x.x.x
ccm-manager mgcp
ccm-manager music-on-hold
ccm-manager config server x.x.x.x
ccm-manager config (wait for router to register, then remove this command)
!
mgcp
mgcp call-agent x.x.x.x 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 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 rtp payload-type g726r16 static
mgcp bind control source-interface GigabitEthernet0/0
mgcp bind media source-interface GigabitEthernet0/0
!
The above is your standard MGCP config. If you noticed that on your debug isdn q931 that your calls aren't hitting the right channels you can change the behaviour they select by selecting either top down or bottom up on the voice gateway configuration page on callmanager.
09-27-2007 07:34 AM
Hey,
looks cool...
to understand right, is the placing and removing of the "ccm-manager config" command the trick other than the normal MGCP config.
Great discussion, it is good to know that there are workarounds atleast to use them for lab purposes
09-27-2007 07:36 AM
Everytime you enter ccm-manager config the MGCP Gateway will download its configuration files from callmanager overwriting your fractional E1 config. Give it a try.
HTH
09-26-2007 11:16 PM
I believe Cisco may say no but we've been using Fractional PRI's for years with MGCP. No problems reported from our customers. Infact, an install I did last week was 2 Fractional E1's (one e1 had 13 and the other had 8 channels) into one MGCP gateway.
11-09-2007 12:40 AM
Hi,
i have a question about this workaround.
I have a scenario with a Cat 6000 E1 Blade and need a separate QSIG Gateway with a fractional E1 with 10 B-Channels. I remember that i can disable some B-Channels in the CCM Service Parameters, but i think this will also affect the E1 Blades, right ?
If i do not disable this channels and work with the config you provided, how does the ccm know, that he cant use the 11th channel ?
Kind regards
Steffen
11-09-2007 06:38 AM
Hi Steffen,
The pertinant commands here as far as I know are;
controller E1 0/0/0
pri-group timeslots 1-8,16 service mgcp
controller E1 0/1/0
pri-group timeslots 1-13,16 service mgcp
I don't think any disabling of B-Channels on CCM itself is necessary.
Hope this helps!
Rob
11-09-2007 07:04 AM
Joel,
Take a read of these threads:
If you have ccm-manager configured, I would remove that line as CCM has no way of knowing how many channels are active on the PRI. CCM will therefore assume there is a full PRI and change the config as a result.
hth,
Ajaz
11-09-2007 08:49 AM
The limitation within CCM is that you can only configure the channel maintenance status for 5 gateways. This cerntainly is the case in CCM5.x
Therefore I would not specifically reconfigure the pri-group unless it was absolutely necessary. If you are able to change the maintenance status, then I would recommend this.
However, as I have mentioned on previous posts, I would only configure the pri-group with the respective number of time-slots only in order to preserve DSPs for transcoding/conference resources on the same gateway.
Regards
Allan.
11-09-2007 09:05 AM
Hello Joel
Have a look at this url if you haven't already seen it. It describes how to busy out the channels on the call manager, sorry Unified Communication Manager
Thanks
Feisal
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