Using DNS (or multiple IP addresses) for SIP Setup 1

[aiosolutions]

Does anyone have any tricks/work-around's for implementing SIP trunks using DNS or multiple IP's? We just setup CallCentric as Line 11 with one single SIP URI phone number. The only way I can get the actual SIP Line to work is by performing an nslookup on callcentric.com and using the first IP in the list of 7 IP's and putting that into the IP section of the SIP Line config tab. The inbound and outbound calling works fine (we've been through this SIP setup 2 time prior; once with Curry IP and once with Broadvox - which we're still using on line 10).

We use Broadvox on Line 10 as our primary inbound and outbound calling. CallCentric is just going to be used for inbound calls to track marketing campaigns since their reporting is much better than that of the IP Office or Broadvox and I can provision new phone numbers on the fly via the web.

There is no immediate issue but CallCentric tells me that we may experience intermittent call issues if the call comes in on the IP that we're not peered to. That's not going to be good considering these phone numbers will be printed on different advertisements for the sole reason of receiving a sales call.

So does anyone have any suggestions? Is there any way to use DNS? Maybe there's some way to put in 7 SIP Lines all configured the exact same with the exception of the different Peer IPs? Or is my best answer to get a Cisco ATA186-type device, configure it properly, and then find a way to integrate it into the IPO? All the inbound calls from CallCentric are going to go to our Sales Hunt group so it's not like we're going to be routing these calls to all sorts of different people groups.

Any suggestions would be appreciated.

Thanks,

--
Mike

 

[IPOfficeIreland]

If I am reading your thread correctly, it is 7am!, this is quite common for a provider. They might have several proxies for sending calls to you, so you would see a different IP address in the invite. The IPO only responds if it has the SIP IP listed in the trunk.

Simply create a new SIP Trunk with the IP they use for as many as you need. Turn off registration, leave the incoming TG the same so you don't have to create new ICR rules and already assuming you are using USE USER DATA, but only use 1 TG for outgoing (the one with registration).

That will work.

 

[aiosolutions]

Thanks, that worked!

--
Mike

 

[PhoneGuyNJ]

Wont that eat up all of your licenses?

 

[aiosolutions]

No, the SIP licenses only get used up as channels are in use. You can create as many SIP Lines as you want, if none of them are in use then none of them will pull a license. It's working so...

--
Mike