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Cisco SRST questions

I am running Call Manager 9.1.2 and Unity Connection 9.1.2 in my main office. We have a small branch office, we ported their phone numbers over to the main office about a year back, and their Cisco IP phones now register over a VPN to our main office. This works great until there is a WAN outage, then they are without phones. So I was reading about SRST. So lets say I get 4 analog lines installed at this branch office and install an SRST router (2911). This will allow them to call outbound during a WAN failure, but what about inbound calls? Their main numbers are not going to work because their main numbers were ported over to our main office. So how will they still get their inbound calls? What do people do in this situation? I feel like it has to be common, but i can't seem to figure it out.

ASKER CERTIFIED SOLUTION

Ken Boone

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denver218

ASKER

Thanks Ken. So there are about 8 people at this remote site, so we were thinking about getting 4 analog lines there, so if the wan goes down, and they loose access to call manager, SRST takes over. So under normal circumstances all calls come in through the main site. I'm still a little confused as far as inbound calls go with SRST in the event of a WAN outage. If the WAN goes down the SRST loses connection to the main site. So would I have to have the telco forward this branch sites numbers to their analog lines? Let's say under normal circumstances the outside world dials 555-555-5555 to get to the branch office. If we lose wan connectivity how will 555-555-5555 know to be sent to SRST router with the analog lines? Thanks for your help.

buckethead34

Ken has the right solution. Calls will come into your main site and CUCM can redirect them if there is an outage. You need to do it with translation patterns.

Ken Boone

You would configure a translation pattern in CUCM that would match 5555555555 and translate the called party number to 8008675389. Now if you dial 9 to get out then you would have to xlate to 98008675309. 8008675309 would be the number that is associated to one of the analog lines at the branch.

denver218

ASKER

Thanks.