Help with Cisco IP 7940 telephone
Discussion
I know that there are a few IT type people on here and any help would be much appreciated.
I have acquired a Cisco IP 7940 telephone which I want to use at home, connected to a standard domestic telephone line. I have the optional power supply which powers up the phone, but I can't seem to get it to work. The phone has various socekts at the back for connecting to a router and PC via a network cable but also has a socked marked "AUX" into which fits a standard phone line connection. However, when I plug the phone line in, there is no dialing tone.
I also have broadband installed on my line but have the neccessary filters fitted, with which my standard home phone works perfectly.
Is it possible to get the Cisco phone to work at home, and if so how do I do it?
I have acquired a Cisco IP 7940 telephone which I want to use at home, connected to a standard domestic telephone line. I have the optional power supply which powers up the phone, but I can't seem to get it to work. The phone has various socekts at the back for connecting to a router and PC via a network cable but also has a socked marked "AUX" into which fits a standard phone line connection. However, when I plug the phone line in, there is no dialing tone.
I also have broadband installed on my line but have the neccessary filters fitted, with which my standard home phone works perfectly.
Is it possible to get the Cisco phone to work at home, and if so how do I do it?
Surely you need to connect it your pc, get a copy of the CISCO software loaded(not going to be cheap), and then look at www.cisco.com/E-Learning/bulk/public/celc/7940_Tutorial/index.html
all correct.
This is not a phone as you know it. It sends voice data INSIDE an IP packet, which is the kind of data the internet uses. Voice uses an entirely different system to send data.
So your phone line plugs into a box (in a BT exchange) that is designed to send and recieve traditional voice type of data. Your IP phone (much the same as a PC) needs to talk to a box that understands Internet (IP) type of data. If you connect (via broadband) to your BT exchange, they have a box there that talks IP to your PC (albeit down the same piece of wire as voice).
This is not a phone as you know it. It sends voice data INSIDE an IP packet, which is the kind of data the internet uses. Voice uses an entirely different system to send data.
So your phone line plugs into a box (in a BT exchange) that is designed to send and recieve traditional voice type of data. Your IP phone (much the same as a PC) needs to talk to a box that understands Internet (IP) type of data. If you connect (via broadband) to your BT exchange, they have a box there that talks IP to your PC (albeit down the same piece of wire as voice).
Not sure on the 7940, but if it's like the 7960 (which I have) in terms of supporting a standalone SIP deployment then you can get it to work if you have a router.
Set up an account with a SIP provider (I use www.sipgate.co.uk, but there are loads out there if you look) and put the settings into your handset, plug it into the router (using cat 5) and set port forwarding on your router for udp 5060 to the IP of the 7940 (Ideally set the 7940 to have a static IP)
That's the simplified explanaion, upgrading the image if you don't know what you are doing can brick your phone so be careful. (the IP phones support SIP SCCP and SKINNY from what I remember, you'll need the SIP image (unless you run a call manager at home which I doubt))
Set up an account with a SIP provider (I use www.sipgate.co.uk, but there are loads out there if you look) and put the settings into your handset, plug it into the router (using cat 5) and set port forwarding on your router for udp 5060 to the IP of the 7940 (Ideally set the 7940 to have a static IP)
That's the simplified explanaion, upgrading the image if you don't know what you are doing can brick your phone so be careful. (the IP phones support SIP SCCP and SKINNY from what I remember, you'll need the SIP image (unless you run a call manager at home which I doubt))
The aux socket will be for a headset or an expansion module. At least, usually. Def not for a telephone line, as above!
It's conceivable it's for you to plug the pc in to, then the phone in the router from the other socket, depends on the rest of the labelling, I'll bow to those who know more.
Buy an avaya phone; the avaya vpn client is damn good - got a 5410 sat next to me now, works a treat. Plus when I work from home, I can log it in as my desk phone, and no one can tell the difference.
It's conceivable it's for you to plug the pc in to, then the phone in the router from the other socket, depends on the rest of the labelling, I'll bow to those who know more.
Buy an avaya phone; the avaya vpn client is damn good - got a 5410 sat next to me now, works a treat. Plus when I work from home, I can log it in as my desk phone, and no one can tell the difference.
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