FXO - E1 preference

[Youssef Aoufi]

Hi all,

I need help configuring 2 h323 Gateways.

I am using CUCM 8.6 and 2 2911 GWs.

Our system is as follow:

• Route list containing a route group with both gateways in a circulat mode.
• Each GW contains 8 FXO ports and an E1

For mobile calls, i want to use the FXO ports as first option. If all ports are busy or unavailable switch to the E1. It can be easly done using preference command into the dial peers.

The problem is that i want to test all the FXO ports on both gateways before using the E1s.

Now my config is as follow :

1. Dial peers for FXO ports with same destination pattern and no preference command (preference 0)
2. Dial peer for E1 with preference 1

When a mobile call reachs a gateway, it tries to send the call using one of the 8 FXO ports , if they are busy it sends the call to the E1.

What i want to configure is:

1. User calls mobile
2. route list sends the call to one of the GWs
3. If all the FXO calls are busy, try with the second gateway's FXO ports,
4. If they are also busy , send the call to the E1

Thank you in advance

[Karthik Sivaram]

hi Youssef,

You can do this :

1) create a Route List on the callmangar with 2 Route groups  . In each of the 2 RGs have a H323 gateway. This would help in having redundant H323 gateways to take the calls.

2) on the H323 gateway CLI configure a trunk group for the fxo ports and E1 .You could then assign the preference at interface level (trunk-group XXX ), and use a single "trunkgroup" statement in the dial-peer.

Hope this helps!

Thanks,

Karthik

[Youssef Aoufi]

Hi Karthik,

Thank you very much for your help,

I don't understand how could the trunk groups solve my problem.

Regards

[Chris Deren · Accepted solution]

Correct, trunk groups are not help you here. You have 2 options here:

1. Build a voip dial peer on the GW to point to the other GW

2. Prefix digitis on the Route List to distinguish Mobile calls

I prefer method 2 and I have done it successfully several times. Basically your Route Pattern that matches mobile pattern would prefix lets say another off-net access code at the Route Group within Route List level. So, here is the config:

Route Pattern for Mobile Numbers (Mexico example :-) 9044XXXXXXXXXX

Route List --> Route Group 1 - prefix 9 --> GW1, GW2

                    Route Group 2 -  no prefix --> GW1, GW2

Dial peer config:

GW 1 - destination patterns 99044..........     preference 0, FXO trunk group

GW 2 - destination patterns 99044..........     preference 0, FXO trunk group

GW 1 - destination patterns 9044..........     preference 1, PRI

GW 2 - destination patterns 9044..........     preference 1, PRI

HTH,

Chris

[Youssef Aoufi]

Thanks Chris for your right answer,

That did the trick!!!

Best regards