can a router simulate a pri?

Dear Experts,
I am planning a possible configuration change, and I’d like to get your input on it.

We currently have a NEC PBX System. We have PRI lines connecting our 2 offices. The PBX at each site connects to a Kentrox Satellite 932, which in turns connects to the PRIs. This allows each site to call one another.
We have a data connection between the sites and I’d like to find a way to use that connection to facilitate the communications.

This is what we currently have:
NEC PBX ------- Kentrox ------ NIU --------pri -------- NIU----------- Kentrox ------ NEC PBX.

This is what I am considering:
NEC PBX ---- Kentrox ---- Serial Port_2821 Router _ Fa Port ------ IP/Ethernet data connection ------ FastEthernet Port_1811 Router _ Serial Port  ------Kentrox------ NEC BPX

So basicly, I would be using the routers to simulate the pri. The idea is that I could conver the converstation from the  Kentrox into SIP or SCCP and then convert it back at the other router.
Is this even possible? Could I do it with WIC cards or would I need VIC cards?
Would the voice configuration require a certain level of IOS on the router?
What type of configuration examples should I be looking at?
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

What you need is media gateway.... there are standalone devices, for example, look at this from AudioCodes:

Their Mediant 1000 (or other gateway products) can act as the gateway between a "legacy" PBX using PRI/T1/FX0, convert to SIP to be routed over WAN, to another Mediant at the other side, converting back to PRI/T1/FX0...

If you look at this diagram of theirs: you can see that it is exactly the type of device you are looking for...

Other companies make standalone device, but I am familiar and have installed/setup the AudioCodes products....

I do believe this can be done with the 2821 as well, with a combination of cards like the VIC2-2FXO to connect to the PBX and IOS that includes the "IP Voice" image... (here is Cisco's page with their diagram:

Of course, as with any VoIP products, there are many other network design issues - latency, jitter, QoS, etc... - that all need to be addressed to ensure that the application actually works, but it can be done...

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
IP Telephony

From novice to tech pro — start learning today.