Multible sip providers

[chrisag]

Hi all

I have the following scenario
Ip office 500v2 R9.1 with a sip trunk provider which they use private network for connecting sip lines.
what I want is to connect 2 more providers that they also using private network.
If I configure a router and connect all providers to the router and then connect the router to ip office this will work.
Did anyone tried this before?
Will it work?

 

[Pepp77]

What do you mean by they use private network for connecting SIP lines?

| ACSS SME |

 

[chrisag]

They bring to the customer a modem which it's not connected to the public network, they use their private network.

 

[Pepp77]

You would need a router that can take 3 connections and can route based on IP addresses but sounds like something you would need to discuss with an IT bod rather than an IPO bod.

| ACSS SME |

 

[derfloh]

Even if you have a router that connects the IPO to the three provider private networks how can you tell IPO what "public" address it should use as source for RTP?

I'm not sure if a router's ALG can handle that. I think you have to implement a SBC to 'translate'.

 

[bua21]

I've done something similar to this and i had to use an SBC because of the RTP issue derfloh mentions above.

 

[intrigrant]

Using a router is no problem as long as each SIP connection has its own IP Range.
I see no reason why that could cause any trouble with voice packets because the SIP line wil be registered to the on premise box of the provider, further routing will be a concern of the provider.
We have this scenario for years with a number of providers and no problem at all.

 

[derfloh]

@intrigant
I see no problem as long as the connection to the provider(s) is done through a normal Internet connection but not if every provider expects you to connect through private network between your site and the provider's site.

 

[amriddle01]

This is indeed easy, just give each of their routers their own address in the same LAN and each provider has a IP route that uses their router as the gateway, nothing difficult about it and no other routers or SBC required

 

[intrigrant]

In this case all SIP trunks seen from IP Office terminate at the providers box and not at the far end of the providers.
So if provider 1 use a IP Address 192.168.0.10 and provider 2 uses 192.168.0.20 and provider 3 use 192.168.0.30 then in IP Office use the IP Address 192.168.0.100 and your'e done.
No IP routing, extra routers or whatever.
In our office we have eight SIP trunks setup that way...

 

[chrisag]

Thank you all for your answers.

This provider they will bring 4 modems with different ip ranges i.e 10.10.0.1,10.20.1.1...
The registration needs to be done on the ipo.
So I also believe that I will need SBC, does the portwell handle this.