SIP Trunk over your broadband?

[psydii]

Do you / have done it?

Is call quality good / reliable?

Dedicated line or running over your main internet connection?

What if any special configuration did you have to ask from your ISP?

 

Thanks

[FN-GM]

Do you / have done it?

Yes have it in place

 

Is call quality good / reliable?

Never had any issues at all.

 

Dedicated line or running over your main internet connection?

Goes over the main internet connection. We have a good SLA on this.

 

What if any special configuration did you have to ask from your ISP?

I just setup some firewall rules so only connections between us and the provider are permitted.

[IrritableTech]

I had a few telecoms providers recently telling me that they must provide a dedicated connection for SIP trunks. If they didn't provide the link, they couldn't be responsible for the QOS they told me. Many painted a grave picture.

 

Although I understand this in theory - I think their priority was actually up-selling.

[FN-GM]

@IrritableTech is correct, but the lines they offered us didn't have the SLA our current line is. We trailed in first and found no issues so that's we went down our main route.

[Oaktech]

We had a second line put in to facilitate this, however based on our current utilisation we could easily get a sip trunk onto our main line.

 

We don't do it at the moment, but it is only a matter of time before we do!

[localzuk]

We looked at it and the response from around 5 SIP trunk providers was the same - they want a dedicated line and internet connection to do it.

 

Our LEA and RBC also won't enable QoS on our leased line either.

[Geoff]

SIP simply requires sufficient bandwidth and low latency connection that's stable (low jitter). If you can provide that with your current connection then there is no need to run a second dedicated line IMHO. You can calculate the bandwidth usage for SIP before hand and you can monitor your connections latency and jitter on your current connection usage levels any time you like. It's perfectly possible to load test your connectivity before/during your VoIP implementation too.

[SchoolsBroadband]

Do you / have done it?

Is call quality good / reliable?

Dedicated line or running over your main internet connection?

What if any special configuration did you have to ask from your ISP?

 

Thanks

 

Do you / have done it? - yes and we sell it

Is call quality good / reliable? - So long as you have a good Internet connection with either plenty of spare capacity or QOS enabled

Dedicated line or running over your main internet connection? you can do either both have their benefits / draw backs

What if any special configuration did you have to ask from your ISP? Suggest you ask them to prioritise SIP if possible

 

Other people have made a few good points ref separate / same line. The biggest issue of running phones and data down the same line is what if the Internet connection has a problem? That means no Internet, no phones and no way to contact the school for the outside world. Not good.

 

Also look at your average traffic graphs on your broadband connection. If you have spare capacity you know you'll never use the VoIP should be fine over this connection in general. If you max your line out make sure your ISP do network QOS or if you have an onsite firewall prioritise SIP over all other traffic. Sometimes reserving 1 or 2Mbit can be a good idea just for SIP. G729 codec uses a tiny amount of bandwidth and you can happily run 30 concurrent calls on a stable 2Mbit. Much cheaper than an ISDN 30 line!!!

 

If you'd like any advice feel free to PM.

 

Good luck

 

Dave