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Can someone please help me to understand this IP-PBX setup?
An organization that I belong to has an IP-PBX. They have 3 analog phones connected to it. They have an Ethernet connection going from the PBX to a cable modem, which then goes to the cable company. All of the cables that go to the PBX are labeled. But I noticed that 2 cables not going to any phones were labeled with phone numbers (each cable carrying its own number; phone numbers that are used to call the organization from outside). I assume that those cables are getting a dial tone from the phone company, not the cable provider. From what I see, it appears that the PBX has an Internet connection from the cable company, but it is getting the 2 phone numbers from the phone company. How did they set this up? Why would they choose this setup? What are the advantages of having this kind of setup? Please explain this to me in as much detail as possible.
2 Answers
- joe rLv 71 decade agoFavorite Answer
your question is a bit unclear... if the lines are tagged but not connected to anything, then perhaps those numbers used to be "land line" numbers, but were ported over to their VoIP provider... have to checked these lines for dial tone?
if these lines do go into the IP-PBX then it could just be a matter of redundancy that they would want several copper pair dial tones, along side with the SIP trunks that the VoIP provider is offering, so that if the internet is out, at least they will still have those POTS lines for calls..
- Carl NLv 71 decade ago
Last time I checked, the cable company is unable or unwilling to provide SIP trunks and the local phone company is pretty reluctant to do the same. So, it's possible that one or the other is providing dial tone via an Analog Terminal Adapter or cable pairs and there's a Gateway into the IP-PBX that give you access to outside lines. I prefer this setup because you don't lose control of your phone lines. If you give your lines to someone "in the cloud" and they go bankrupt as some hosted companies are apt to do, you will have a long and tough battle getting your lines ported back to you. At least you know the telco is not going to hose you :-)
