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Cisco VoIP integration with PBX system

By lcw ·
I have an existing PBX system and would like to convert it using Cisco VoIP.I'm suscribing a 1Mb leased line from the ISP and my router will be Cisco2620 with an VIC-2FXO card installed.Do I need a Cisco CallManager to get involved in order to get at least 10-20 call simultaneously at one time.I'm planning to connect the existing PBX system to my router and all the phones will able to use the leased line for calling.
What is a simple hardware requirement?,I knew that VIC-2FXO only allow 2 callone at a time if connected direcly to the PBX system.
PLs advise.

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Cisco VoIP integration with PBX system

by MallardtooXX In reply to Cisco VoIP integration wi ...

first of all how many lines do you have right now? If the existing PBX system is going into your Cisco system do you have enough ports on the cisco to handle it? How many trunks do you have? once again can your cisco system handle it? Do you want to have a Voice Mail solution on this system? Is there one already? is it Cisco compliant? VoIP is in its infancy right now so you have to be careful how you approach it, it can cost you a TON of money if you are not careful and you may get burned in the end. But to answer your question, I would say you would have to have the call manager to do what you want to do.

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Cisco VoIP integration with PBX system

by lcw In reply to Cisco VoIP integration wi ...

The question was auto-closed by TechRepublic

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Cisco VoIP integration with PBX system

by mshavrov In reply to Cisco VoIP integration wi ...

It all depends on your current and future goals.

1. Are you going to completely eliminate your PBX or you just want to use your Internet connection to make a few calls? If you will integrate your PBX with VoIP solution, you should either buy VoIP card for PBX, or connect it by Voice T1 to Voice Gateway.

2. Which phones will you use? Will you have mixed IP and analog phones? In this case you should think again about integrating your PBX and VoIP.

3. CallManager may be not required, if you will have only a few calls - you may just install Linux with free H.323 server (and probably free Gatekeeper). If it will be really "production" usage - install CallManager.

4. Number of simultaneous calls defined not by VIC card, but by VoiceGateway Module (how many DSPs you have installed). But again, if it's phone calls from branch to branch, you may configure static entries (associate Phone number with IP number on Gatekeeper), and use routers only as routers, not as Voice Gateways.
If you have more questions, contact me directly by e-mail.

Good luck.

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Cisco VoIP integration with PBX system

by lcw In reply to Cisco VoIP integration wi ...

The question was auto-closed by TechRepublic

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Cisco VoIP integration with PBX system

by wlbowers In reply to Cisco VoIP integration wi ...

I went through this nightmare. First see if your PBX has T1 capability. This will be the only way to do the multiple call connection. The 2620 will do it. Get your PBX vendor and Cisco together for the design and implementation. Don't try to do it your self.

Also make sure that your isp is providing you with a dedicated 1mb. No reduced cir. (commited information rate) This is usually half of your primary bandwith. If you have a reduced CIR and exceed it during a call or calls, the packets could be delayed or broken up. this will cause loss of audio, crackling, popping, and other forms of static on your audio lines.

Once it is implimented have your data carrier monitor your throughput for a time to see if you are exceeding your bandwith. If you do exceed the 1m some carriers chop it off.

Do this right and it will go like clockwork. try to cut corners like my exboss did and you will need large supply of Malox before it is over.

Good Luck Lee

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Cisco VoIP integration with PBX system

by lcw In reply to Cisco VoIP integration wi ...

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Cisco VoIP integration with PBX system

by lcw In reply to Cisco VoIP integration wi ...

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