[VoiceOps] Optimizing VoIP orig routing to exploit Verizon VoIP TDM interconnections

Jared Geiger jared at compuwizz.net
Wed Dec 11 14:19:49 EST 2013

The Verizon originated calls from the PSTN to our network tend to already
be optimized. For example, our Orlando numbers tend to get media from
Orlando, our DC area ones come from Cleveland, our San Francisco ones come
from San Francisco.

We don't interconnect in these cities. So the Verizon proxies manage the
inbound quite well. If you're doing outbound local, the same occurs no
matter where you send the call.

Inter and Intra state isn't the same, its random as to where the media
comes from.

These observations obviously only apply if you don't proxy media.


On Wed, Dec 11, 2013 at 11:07 AM, Ryan Delgrosso <ryandelgrosso at gmail.com>wrote:

> I think the better question is if this is origination what is the endpoint
> its touching down on? Will that be an IP endpoint or something else?
> If its an IP endpoint is it going to be geographically homed?
> I struggled with this for some time and finally concluded that what I was
> chasing with orig had very little gain on the orig side due to load
> balancing from my carriers etc, so I proceeded with termination since I
> could control it much more tightly. If you are dealing with trunking
> traffic where your customer side is statically defined then you might try
> what I did for term though and do your steering based on the C line in the
> SDP, and make sure your customers peer with BOTH locations so you can avoid
> the back-haul.
> TransNexus and I did a whitepaper on the topic maybe it will give you some
> ideas.
> -Ryan
> On 12/11/2013 10:54 AM, Mark Lindsey wrote:
>> I'm trying to plan a US nationwide georedundant SIP interconnect with
>> Verizon for origination and termination. I want to minimize delay
>> between parties, and heuristically I'll pretend people tend to talk
>> more to other people who are local.
>> So it seems smart to get my "western" origination traffic to my
>> Western SBC primarily, and my "eastern" traffic to my Eastern SBC.
>> Does anyone have a good method for deciding which side of the country
>> it makes sense to send traffic to?
>> For example, when I port a Minneapolis number to Verizon, is it any
>> better to have Verizon send it west, or east?
>> Or does it make no difference at all?
>> My current method is simply to use the Mississippi River. But I'll bet
>> if I had full visibility into Verizon's network and their TDM local
>> access tandem interconnects, the answer might be different.
>>  mark at ecg.co +12293160013 http://ecg.co/lindsey
>>>> _______________________________________________
>> VoiceOps mailing list
>> VoiceOps at voiceops.org
>> https://puck.nether.net/mailman/listinfo/voiceops
> _______________________________________________
> VoiceOps mailing list
> VoiceOps at voiceops.org
> https://puck.nether.net/mailman/listinfo/voiceops
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/voiceops/attachments/20131211/b4311621/attachment.html>

More information about the VoiceOps mailing list