How to use both outbound lines on gateway?

[carl_townshend]

Hi all

I have 2 questions

first one is, if I have 2 idsn circuits with 2 outbound dial peers, how do I get it to use both of them on my h323 gateway?

second, if a call comes in from outside, which then gets forwarded to an external switchboard, they then forward the call back in to us, how many channels on the isdn circuit would it use? Would it be 3?

many thanks 

[Nithin Eluvathingal]

The first question:- you could be able  achieve it by Trunk-Group. Have a look on similar thread.

https://community.cisco.com/t5/ip-telephony-and-phones/how-to-load-balance-calls-when-gateway-have-2-pri/m-p/3403374

https://community.cisco.com/t5/ip-telephony-and-phones/pri-trunk-group-configuration/td-p/3677265

Second Question:- as per the information shared it could be 3.

[TONY SMITH]

It's been a long time since I used Trunk Groups, so this might be fixed by now.  However last time I did so, the gateway did not exclude voice ports that are down from the hunt sequence.  The consequence was that with a top-down hunt sequence, if the first voice port is out of service then all outbound calls failed.  This was confirmed as normal behaviour by TAC.

As I say, it may be fixed by now.

[VON CLAWSON]

For the first question you could use a trunk group as stated above and put the trunk group in the dial-peer. You could also use two dial-peers with the same destination-pattern using the preference command. Without the preference command it will do a round robin approach, with the preference it will use the lower preference first and then the higher preference if it can't get to the first.