I read in the manual that the Panasonic KX-TDA30 PBX takes a 4-Port Analogue Trunk Card (LCOT4) model number: KX-TDA3180 (2xRJ11 and 2xRJ45) and as such I couldn't understand why you only appeared to have the 1x rj11 plugged in with some leads piggybacked out of it.
chriseyj wrote:Many companies that have been giving us quotes for a new system seem reluctant of going the VOIP route.
No doubt they would rather sell you a PBX along with a support contract.
chriseyj wrote:One said VOIP is pointless with the state of internet connectivity in the UK.
While it is true some areas of the UK do suffer from poor internet connectivity it doesn't represent the UK as a whole. If you are in an area that offers a 2mb connection (which is poor in this day and age) with nothing else going on in your network, 3 or 4 simultaneous conversations using high quality codecs should be easily achieved.
Swith to the GSM codec and you can squeeze 10 or more calls simultaneously up a 256kbs pipe. In use, the GSM codec delivers indistinguishable call quality from an ordinary telephone call. Bear in mind, that in the old telecoms world, each call requires one line so using a GSM codec can give you the equivalent of up to 13 lines on a standard ADSL connection!
chriseyj wrote:I thought VOIP could be used internally to aid installation and flexibility of handset relocation e.t.c but phones can then call out externally on a normal line?
You can use a VoIP telephone to call other VoIP telephones (we call them extensions) for free, Page another extension (make an announcement out loud using the other phones built in loud speaker) or make calls to the outside world (chargeable). You can actually do a lot more! Calling features such as caller display, three way calling etc cost you nothing!
Have a read of this: http://www.voipfone.co.uk/What_Is_Voip.php