SIP trunk Resilience
The current Network setup is customer site connected one SIP trunk each in US and Europe respectively
over MPLS Network. The customer is asking for cross region resiliency in SIP Trunks, is it possible? I'm not sure
if inter continent trunking will cause any issues? Please provide pros and cons.
over MPLS Network. The customer is asking for cross region resiliency in SIP Trunks, is it possible? I'm not sure
if inter continent trunking will cause any issues? Please provide pros and cons.
Aaron Tomosky
Depends on the phone system. Most of them can do failover out multiple sip trunks or even a PRI connected to one system. You can also add a hosted SIP provider for even more resilience.
Do the current SIP providers allow multiple logins/ login from multiple sources.? that would be a first requirement.
(if not, that you can still configure them as disabled, it would require a manual enable to fail over then).
It would at least get your local dial plans setup.
(if not, that you can still configure them as disabled, it would require a manual enable to fail over then).
It would at least get your local dial plans setup.
Check with your SIP provider. Some do, some don't.
If you can't find a SIP provider that allows two logins, get two accounts (same or different provider) but arrange that either sip trunk will allow you to present any outgoing number, and use a SIP provider who can re-route incoming calls in the event of a trunk failure.
In the UK you can use Gamma with "CLI Flex" enabled and "Sip trunk call manager". I have to assume you can find a similar service in the USA.
If we can help, we're a Gamma reseller and can facilitate the UK connections!!
If you can't find a SIP provider that allows two logins, get two accounts (same or different provider) but arrange that either sip trunk will allow you to present any outgoing number, and use a SIP provider who can re-route incoming calls in the event of a trunk failure.
In the UK you can use Gamma with "CLI Flex" enabled and "Sip trunk call manager". I have to assume you can find a similar service in the USA.
If we can help, we're a Gamma reseller and can facilitate the UK connections!!
ASKER
Experts;
Thanks for your comments.. I have three questions:
1. Dial plans are very different for US and Europe, so if we put two SIP Trunks (Primary and failover), I am not sure how is it going to be resolved.
2. With amount of latency that would be incurred for US Calls getting redirected to EU and back to US, not sure if that makes sense?
3. If that is possible, a customer can redirect all EU calls back to US to save on PSTN calls, there should be some Regulation to stop it (?)
Please let me know if I have not fully explained myself.
Thanks for your comments.. I have three questions:
1. Dial plans are very different for US and Europe, so if we put two SIP Trunks (Primary and failover), I am not sure how is it going to be resolved.
2. With amount of latency that would be incurred for US Calls getting redirected to EU and back to US, not sure if that makes sense?
3. If that is possible, a customer can redirect all EU calls back to US to save on PSTN calls, there should be some Regulation to stop it (?)
Please let me know if I have not fully explained myself.
Redirecting US calls to come out a US sip to save on fees is normal. Again, support for this and how to setup is highly dependent on your phone system. It's easy on shoretel/mitel, avaya is possible but complicated, and that's my on prem phone system experience.
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ASKER
What I am hearing is that cross region resilience is possible, what are some of the show stoppers? Can someone please shine
some light on it? From PBX point of view, the customer has Cisco CUBE and CUCM.
some light on it? From PBX point of view, the customer has Cisco CUBE and CUCM.
Ah, if you want to do it with one US and one UK trunk then yes, your resiliance plan will include the possibility of say, making UK calls as "international" calls on the US trunk if the UK trunk is down. There's a cost to that but, frankly, trunks are rarely down, so that's probably cheaper than having TWO trunks for each country, which is what I originally assumed you meant!
Just out of interest, where is the PBX and how connected to the 'net?
Just out of interest, where is the PBX and how connected to the 'net?
ASKER
ccomley;
I like the idea of charging Intl. rate for the US originated calls routing via Europe. but
How would dial plan get notified if the US SIP Trunk is down?
I like the idea of charging Intl. rate for the US originated calls routing via Europe. but
How would dial plan get notified if the US SIP Trunk is down?
ASKER
Thanks;