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DID's and RedundancyI am tasked with providing my Customers with 3 DID numbers with maximum availability. I have chosen Callcentric, voip.ms and Anveo and their relevant partners to provide one number each. The idea being that if one number is down for any reason, then at least one of the other two will be available.
The aim of this thread is to gain a better understanding of the physical aspects of a DID and what can go wrong along the audio path of a voice call.
As an example, I have a New York DID provided by Callcentric via the CLEC Telengy. Does this mean that Telengy will have a physical presence somewhere in New York and that all DID's, regardless of the provider, are linked to equipment in the physical location of a City/State? I need to know this for geographic redundancy.
Am I correct in thinking that if either one of Callcentric or Telengy are down, calls cannot be taken on my New York DID?
Does the same apply to voip.ms and Anveo?
Voip.ms have confirmed they use different CLEC's to Callcentric, and I know Anveo use VoxBone, so I'm happy with the level of VoIP Provider and CLEC redundancy built into the 3 DID's.
If there are any weak links that I've missed, please let me know. |
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MangoUse DMZ and you get a kick in the dick.
Premium Member
join:2008-12-25
www.toao.net |
Mango
Premium Member
2013-May-19 9:14 pm
Telengy is operated by Callcentric. You're correct that they have a physical presence in New York and their DIDs are routed through that location. (As far as I am aware, this will be the case with many/most? DIDs from any carrier.)
Keep in mind that Voxbone is not a carrier in some areas and may not be the actual carrier that serves your DID. Other than that, you should have a healthy level of redundancy with three service providers. |
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to ThaiGuy
said by ThaiGuy:As an example, I have a New York DID provided by Callcentric via the CLEC Telengy. Does this mean that Telengy will have a physical presence somewhere in New York and that all DID's, regardless of the provider, are linked to equipment in the physical location of a City/State? I need to know this for geographic redundancy.
Am I correct in thinking that if either one of Callcentric or Telengy are down, calls cannot be taken on my New York DID?
Does the same apply to voip.ms and Anveo?
Every DID (phone number accepting inbound calls from the PSTN) comes from a LEC [CLEC or ILEC] in the US/Canadian system. Every LEC has a geographic presence. However---and I am sure the providers could explain this better than me---a geographic presence is a little more flexible these days. That's because telephony is done more now with software and computers, not so much with electromechanical switches. For example, I have a DID in a certain New Jersey town, but the CLEC's presence seems to be 65 miles away. But that's not really relevant to your goal, it seems to me. The important thing is using DID's from different CLEC's.... All of the free NY DID's from CC will come from Telengy CLEC. But other CC DID's will come from other leading CLEC's such as XO and others.... |
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to Mango
said by Mango:Telengy is operated by Callcentric. You're correct that they have a physical presence in New York and their DIDs are routed through that location. (As far as I am aware, this will be the case with many/most? DIDs from any carrier.) So if one goes down, they are effectively both down? Would that also be the case for CC DID's through other LEC's? said by Mango:Keep in mind that Voxbone is not a carrier in some areas and may not be the actual carrier that serves your DID. Interesting. I did notice a few VIA lines in the INVITE's on calls to my Anveo DID but didn't think anything of it at the time. I have accounts with F9, CallWithUs and a couple of others. Do you think one of them may be a wiser choice for the purposes of LEC redundancy? |
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| ThaiGuy |
to PX Eliezer1
Thanks for the confirmation. Are there any states that are generally considered more 'reliable' than others for the availability of telephony infrastructure and are there any states or cities that should be avoided? ....or am I going too far here  |
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I think that with CC, Anveo, and Voip.MS, you have some redundancy.
If the location of numbers does not matter, why not pick 3 different parts of the country.
And why not pick Utah for one location. Most everywhere else has risk of hurricane, flood, earthquake, blizzard, or tornado. |
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to ThaiGuy
said by ThaiGuy:said by Mango:Telengy is operated by Callcentric. You're correct that they have a physical presence in New York and their DIDs are routed through that location. (As far as I am aware, this will be the case with many/most? DIDs from any carrier.) So if one goes down, they are effectively both down? Would that also be the case for CC DID's through other LEC's? That's the case with every VoIP provider and LEC used, if one is down your DID will not work. |
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 cb14
join:2013-02-04
Miami Beach, FL |
to PX Eliezer1
said by PX Eliezer1:And why not pick Utah for one location. Most everywhere else has risk of hurricane, flood, earthquake, blizzard, or tornado.
In Utah, you have Mormons.  |
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MangoUse DMZ and you get a kick in the dick.
Premium Member
join:2008-12-25
www.toao.net |
to ThaiGuy
said by ThaiGuy:Do you think one of them may be a wiser choice for the purposes of LEC redundancy? At this price point, I think you've made some fine choices. If you require even higher reliability, you could consider a service provider like AcroVoice that will offer you an SLA. |
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Thanks for all the help. I have a Customer making calls from a cellular network in the Caribbean(mainly Barbados) and it can take up to 3 minutes to connect to my New York DID's. Do you think this would be the same wherever and whoever provides the DID, or is there a chance I could improve things by getting a DID closer to the Islands?
Would Miami be much different to a Dominican Republic or Puerto Rico DID? |
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said by ThaiGuy:Thanks for all the help. I have a Customer making calls from a cellular network in the Caribbean(mainly Barbados) and it can take up to 3 minutes to connect to my New York DID's. Do you think this would be the same wherever and whoever provides the DID, or is there a chance I could improve things by getting a DID closer to the Islands? This sounds like limitations unique to the Caribbean cellular network. For purposes of troubleshooting, it might be helpful to know if that delay is typical of all calls that your customer places to the United States, New York, and/or to other international destinations. Further, does the customer see the same delay from a landline provider? |
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Unfortunately they don't have access to a landline as I don't think there are too many left over there. I have setup a UK DID today and next time we hit the delay problem, I will get them to try the UK number. We also have a SIM from an alternative cell provider to try, so we should eventually isolate the problem. |
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 DavesnothereChange is NOT Necessarily Progress
Premium Member
join:2009-06-15
Canada
3 edits |
to ThaiGuy
Your idea of subscribing to multiple providers who each use a different CLEC (whether they own the CLEC or not) is a very good strategy in general.
Also, in the case of VOIP.MS (and as is frequently extolled here), you can specify which of their many servers in various cities to which you wish your equipment to register for their DID.
In MY territory of Eastern Ontario Canada, two of those 3 providers use the same CLEC, but in major centres like NYC, chances are that they each are unique in that regard.
Choosing one provider (and even a phone number) based on the West coast would still be of interest, as the resulting interconnect to the PSTN system might be somewhere other than NYC, and thus less likely to be affected by the same negative event at the same time as one chosen on the East coast. |
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ThaiGuy
Member
2013-May-20 12:19 pm
Just finished another round of testing. Calls from both cellular SIM's took 3 minutes to connect to both of my CC and Anveo US DID's. They connected in seconds to a Sipgate.co.uk DID but took 3 minutes to connect to my Anveo UK DID using the Belgian POP.
It's all a bit confusing, so I have no option other than to order a Dominican Republic DID and see how that goes. |
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said by ThaiGuy:Just finished another round of testing. Calls from both cellular SIM's took 3 minutes to connect to both of my CC and Anveo US DID's. They connected in seconds to a Sipgate.co.uk DID but took 3 minutes to connect to my Anveo UK DID using the Belgian POP.
It's all a bit confusing, so I have no option other than to order a Dominican Republic DID and see how that goes.
Do you have a Google Voice DID and have the capability to "register" that gmail account (Obi ATA or through a Simon Telephonics gateway or Asterisk)? If so, could you try a call from the Caribbean to see if you get the same results? I have a GV number and get a number of calls from one specific Caribbean Country without any such delay. Recently, I have been having problems making outgoing calls to that Country using CallWithUS (both Land Line and Mobile-Lime & Digicel) |
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Dave, I'm based in Thailand so am not allowed Google Voice. I'm pretty sure my Customer doesn't have it either as they rely on me to set things like that up. |
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SCADAGeo
Premium Member
join:2012-11-08
N California |
to PX Eliezer1
said by PX Eliezer1:And why not pick Utah for one location.
I have the impression that DID's in the Bluffdale, Utah area will be very reliable in the very near future! |
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hardly
Premium Member
join:2004-02-10
USA |
hardly
Premium Member
2013-May-21 2:09 pm
Especially if you wear a tinfoil hat. » www.wired.com/threatleve ··· acenter/ |
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 XANAVirus
Premium Member
join:2012-03-03
Lavalette, WV |
Sure would be nice to get some colocation on that datacenter.  No doubt it's gotta have great peering towards everywhere in the US. (What with being the national storage ground for basically all network traffic everywhere, at least as its intended usage.) Though actually hosting anything there would be a pain, since I'm sure even the IP numbers are top secret, and of course those confidentiality requirements would be a pain to get maintenance around to do remote hands and stuff. Nah, I think I'll stick with LeaseWeb. My VPN provider recommended them. |
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