resilient telecom service

[tarx]

Has anyone experience of using multiple telcos to provide resilient voice services.
Specifically for inbound calls to a 1800 (800 / 0800) service.

Do you need to configure alternate terminating numbers and have a primary telco redirect to the secondary if the primary has an outage? This still requires callers to be able to access the primary telco (so they can divert) therefore would work for trunk issues but not for primary telco 'core' problems?

Any thoughts / advice please.

 

[Sympology]

In the UK we use two telco's (and each two locations)to handle Non Geographic numbers.

So
Number comes in

08xx > Provide A Site A. If ok will connect.
If fails (Fast busy, No Answer)
Goes to Provider A Site B, again if it fails cascades to provider B.

This is all handled by our Non Geo number providers and is independant of Telcos. We have web access so we can change these routes at any time.


We have an extra advantage that we use VoIP to route calls from the telcos, but no reason you couldn't use just standard ISDN.

I'm guessing in your scenario, it will come down to the company supllying your numbers.

Only the truly stupid believe they know everything.
Stu.. 2004

 

[tarx]

Thanks Sympology.

We do something similar to this by routing our trunks via different exchanges, and ducts, with the single telco.
How is the initial delivery handled when provider A failsover to provider B? I assume provider A has to handle this.

Thanks

 

[Sympology]

All our is 100% handled by the provider of the Non Geo numbers, not sure how ir works in the US, but we have:

Provider X running 08xx numbers. These point to physical PSTN by provider A. If X gets a fast busy (line down) or No Answer after 5 seconds (our systems always answer), then X will try to route the call to the next PSTN number in it's list, be it a 2nd number with A or another number with Provider B.

In other words X handles all the routing.

Only the truly stupid believe they know everything.
Stu.. 2004