Voice and Data split

[desmacauley1]

Hi All,

Hope you can help me clarify something.

Our client is moving from one provider to another. The current ISP provides 100MB circuit and some sip trunks. The new provider do not do SIP, so the plan is to cancel the 100MB data circuit with the current provider but keep the SIP trunks and use the new providers 100MB data circuit. So data will go through the new provider which will have a site to site vpn to a hub FW over which internal voice traffic (ie to other branches) will flow. External VOIP will go over the trunk provided by the old provider. That should work right?

dmac

[Francisco Granados]

Planning is essential for this type of changes. All parties should be involved.

You will have to check with your current provider and make sure proper steps are taken so the SIP trunk is still operational under the new provider.

From a technical perspective, it can work. Not all SIP providers are ISPs... the SIP authentication might need to change so it's best to tell your current provider what you are doing. Also, make sure you are not losing other features like QoS (which might happen if your new provider will send the Voice traffic over the public internet to your SIP provider).

Thanks,

FG

[desmacauley1]

Thanks FG,

The SIP trunk will still be operational under new provider.

Just to clarify there is one line from the current provider to client premises. Over that fiber circuit the provider delivers 100Mb internet access and some SIP trunks. The current provider will be ceasing the internet line but keeping the SIP trunks.

The idea is that data traffic and VoIP traffic destined for branches offices goes over the new provider line (VoIP traffic will go over site to site VPN) but VoIP traffic destined to and from non branch offices will go over the curent/old provider line delivering the SIP trunks.

Should work right?

[Tristan Cober · Accepted solution]

I think you may misunderstand the concept of SIP Trunks. In the case you described, VoIP and Data would both go over the new ISP, and the Old ISP would just change the IP address their SBCs point to.

SIP Trunks themselves do not carry data, they are simply a SIP endpoint. Think of it like a next-hop for a route in the network realm, except for SIP signaling in this case.

You would need to retain the Data services with the old provider, if you wish to use that line separately for VoIP.

[Francisco Granados · Accepted solution]

You are correct. +5

Desma,

Your current SIP trunks are not physical lines, they are "virtual channels" inside that 100mb link. If you disconnect the 100mb link, you will lose your SIP trunks. However, your SIP provider can still make the SIP trunk work over the new ISP, with a few changes.

I would recommend that you communicate with all parties before making any changes.

Thanks,

FG