SIP Trunks

[rlstiles]

Hi folks,

Wondering what people are doing to support the implementation of SIP Trunks to IP Office systems. Do you require the end customers to have a Session Border Controller or do you connect the trunks directly to the WAN port of the IP Office? We are looking at starting to implement them and wondering what the "Real World Best Practices" are with respect to IP Office.

Thanks.

 

[intrigrant]

Most of our customers have their own firewall/router to the internet so we either go out on LAN1 or LAN2 depending how the customer has setup their network.
We have no customers using a Session Border Controller as these are too expensive compared to the benefits.

 

[acollard83]

For us, it all depends on their network configuration and how many channels they have as well as what provider they are going to use. We are a SIP trunk provider and in most cases there is an SBC of some sort. We like the EdgeMARC devices from Edgewater Networks, but they can get pricey. We've also used a linux appliance with OpenSIPS as an SBC.

 

[acollard83]

And also, the simple port forwarding on their firewall/router device.

 

[amriddle01]

Good SIP trunks will transition routers without port forwarding and no need to put the WAN on the net. Session Border Controllers on the customer side just pushes the cost of SIP up to ISDN levels but without the benefits if ISDN, I don't see why you would do it unless ISDN wasn't available and the costomers network requires one



"No problem monkey socks

 

[telcoguy]

At least a good router with ACL capabilities and port-forwarding if the customer allready has infrastructure over internet, but preferrably an extra EVC (second virtual circuit on the same physical line as the internet circuit) from the telco.
This is a non-internet circuit going straight to the SIP core of the Telco running with a QOS, and less bandwidth issues, and added security as a bonus.
(Over here that will cost you about €12/month additional,for as many channels you have bandwidth for, which is a fraction of the cost of an ISDN. It provides more more features, like rerouting functionalities, name presentation etc.)