Comments on: Ask Mr. Andrews: What is SIP Trunking and Can it Save My Business Money?

By: Martin Ramjit

Martin Ramjit — Sun, 27 Jun 2010 14:11:37 +0000

Hi Cory,

I work for TeraGo Networks and we are delivering SIP trunking over our FIXED WIRELESS BROADBAND services. We differentiate in many ways compared to our peers. For example we control the last mile 100% to offer a 99.9% availability and a 3 hours MTTR ( to repair not respond) We will fix the problem in three hours. Local DID’s in north america and globally.

If you have inquiries on your boad please refer them to me and I can help out where I can. I have 3 bands for SIP that are pretty standard.
5-10 SIP on a 3 yr plan $35.00
11-25 SIP on a 3 yr plan $30.00
26-50 SIP on a 3 yr plan $22.00
Also burstable option at $3.00 per channel

By: Sylvain

Sylvain — Wed, 17 Dec 2008 21:23:05 +0000

Mr Andrew, Can you let me know what such provider has partnered with Bell Canada? i’m much interested in having SIP trunk for all our retail location in Canada.

Thanks!

By: Chris

Chris — Wed, 03 Dec 2008 19:42:19 +0000

Before jumping in on the SIP you should check out your internet connection. Simplying Googling “internet connection test for SIP” will yield some results, and will test your line. My VoIP sip that uses internet is 10x better than my cell phone, and my router handles the QoS

By: Frank

Frank — Thu, 23 Oct 2008 03:39:42 +0000

Lucy:

What kind of T-1 is this? Was it an internet T-1? If that’s the case, then why would you expect the ISP to apply QoS to the traffic, end-to-end? Was it a PtP T-1? If that’s the case, where did the far end go back to? Ideally it would go back to the SIP trunk provider.

By: Cory Andrews

Cory Andrews — Wed, 22 Oct 2008 19:07:56 +0000

Lucy – I feel your pain. In a perfect world our last mile data provider would also be the one providing our SIP trunks, and managing QoS end to end….but then, I guess, we’d be right back where we started before telecom deregulation and the rise of alternative telephony options. It’s a bit of a conundrum. I know of a SIP trunking provider in Canada who has partnered with Bell Canada….thy provision SIP trunks over Bell Canada ADSL service which has been engineered in such a way as to provide a dry loop connection back to the NOC. They actively manage QoS on the DSL circuit, and it is put in and provisioned exclusively for voice, no data at all. They charge a flat rate for the ADSL circuit, which will accomodate 6-8 SIP trunks. So you pay a fixed amount of money, per month, for the circuit and the trunks and an affordable CPM for LD and international calls. I’d love to see more providers in the US figure out a way to partner with the network operators for mutual benefit. Bandwidth.com also does a great job with their SIP trunking and offer a solid SLA which minimizes risk due to lack of performance.

By: Lucy

Lucy — Wed, 22 Oct 2008 18:15:51 +0000

One word of caution about SIP trunks. We ran into trouble because our office is in a rural location and the internet provider did not offer Quality of Service (QOS) on the T-1. We spent hours with the SIP provider (different company) trying to figure out call quality issues before we finally narrowed it down to QOS. Unfortunately, we did not have the option to switch to another T-1 provider in our area. Bottom line – we lost a lot of time and money.