7970G--871--VPN--2811--POTS ...feasible?

Answered Question

Hi there. We are a B2Gov homecare provider in Quebec. Could you shed some light on our planned configuration?

Our clients are all in the same city and call quality is a top priority. Our operator is mobile to say the least. When she's not elsewhere, she has a desk in France, Australia and New York. She handles about 50-100 calls a day. I'd like to equip her (and later her assistants too) with an IP phone and connect it to a 800 series router which would setup a VPN connection through the internet cloud to our local 2811 router (with Call Manager Express) so that she could make/receive calls to/from the local telephone network (POTS). 3 questions:

1- Is this the most robust way of connecting our operator to the local POTS?

2- Can we also use SIP or ATA instead of IP phones without sacrificing call quality?

3- Most troubling: how to we connect the 2811 to the POTS?

We were happy to consider 4 VOIP lines providing 4 separate analog signals but apparently the phone company cannot cascade the lines (when 1 busy, incoming call goes to the next line and the last line if busy going to the telco provided voicemail).

Thanks in advance.

Danny

I have this problem too.
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Correct Answer by Paolo Bevilacqua about 9 years 5 months ago

Hi, stuck line is a conditions that happens on FXO in lack of "disconnect supervision", so these remain off-hook and no call can be further made or received before intervention, and sometime also because of anomalies in cisco IOS. It can eliminated or alleviated by configuration, but ISDN BRI does never suffer of that.

On ISDN BRI you can have at most two calls per line at any time. If you have more than one line, ask telco to put them in hunt group under a same pilot number. There is no problem in having simultaneous incoming and outgoing calls on the lines.

Hope this helps, please rate post if it does!

Correct Answer by Paolo Bevilacqua about 9 years 5 months ago

1. If you want to run, control and handle the service, yes. Else, use a voip provider and have the phone register directly to it over the internet.

2. Yes, absolutely. Or the IP communicator on a PC.

3. The most robust way is ISDN BRI, your client would be able to see caller-id any many other IDSN features. You would never have stck lines, etc. the card for that is VIC2-2BRI-ST/TE.

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Correct Answer
Paolo Bevilacqua Wed, 06/20/2007 - 13:18

1. If you want to run, control and handle the service, yes. Else, use a voip provider and have the phone register directly to it over the internet.

2. Yes, absolutely. Or the IP communicator on a PC.

3. The most robust way is ISDN BRI, your client would be able to see caller-id any many other IDSN features. You would never have stck lines, etc. the card for that is VIC2-2BRI-ST/TE.

Thank you -quick and clear!

a)What do you mean by "stck lines"?

b)We must avoid busy signals - since ISDN BRI includes only 2 telephone numbers, can it handle more than two voice calls at a time? ie: Client1, Client2 and Client3 call in, all at the same approximate time, and also, the operator's assistants both need to call out from their IP-phones...

Thanks again.

Danny

Correct Answer
Paolo Bevilacqua Mon, 06/25/2007 - 13:32

Hi, stuck line is a conditions that happens on FXO in lack of "disconnect supervision", so these remain off-hook and no call can be further made or received before intervention, and sometime also because of anomalies in cisco IOS. It can eliminated or alleviated by configuration, but ISDN BRI does never suffer of that.

On ISDN BRI you can have at most two calls per line at any time. If you have more than one line, ask telco to put them in hunt group under a same pilot number. There is no problem in having simultaneous incoming and outgoing calls on the lines.

Hope this helps, please rate post if it does!

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