+ Post New Thread
Page 1 of 2 12 LastLast
Results 1 to 15 of 19
Wireless Networks Thread, Building a VoIP system in Technical; Hi all, I am looking at VoIP in our new school which should be built ready for the new academic ...
  1. #1

    Join Date
    May 2006
    Location
    West Bromwich
    Posts
    2,191
    Thank Post
    299
    Thanked 215 Times in 185 Posts
    Rep Power
    56

    Building a VoIP system

    Hi all,

    I am looking at VoIP in our new school which should be built ready for the new academic year.

    I know very little about how to set up a VoIP system and what hardware is needed. Searching for information is pretty hard when you don't really know what you are searching for and where VoIP is at the moment.

    I was wondering if someone who has gone through this could give me a couple of pointers as to what hardware is needed to get this off the ground and where to go for more advice on what is needed.

    The system we are looking at initially is for internal calls only, with a view to extend this to some sort of internal exchange leading finally onto external communication.

    What sort of costs are involved in doing something like this and are there any per annum costs involved.

  2. #2

    matt40k's Avatar
    Join Date
    Jun 2008
    Location
    Ipswich
    Posts
    4,427
    Thank Post
    368
    Thanked 643 Times in 525 Posts
    Rep Power
    159
    Look at Asterisk :: The Open Source PBX & Telephony Platform |

    You can either get some hardware to "upgrade" your current telephone line to support your VOIP infrastructure. Gradwell can provide a virtual telephone line(s) which you can link into the asterisk server VOIP gateway.

    Business VoIP - Gradwell

    You WILL really need QOS on your switches and ideally POE.

  3. Thanks to matt40k from:

    HodgeHi (12th May 2009)

  4. #3

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,808
    Thank Post
    517
    Thanked 2,469 Times in 1,913 Posts
    Blog Entries
    24
    Rep Power
    835
    Equipment needed:

    Server
    If you are using PSTN lines (ie. analogue lines), you'll need an analogue interface of some form
    If you are using BRI/PRI lines (ie. ISDN), you'll need an appropriate interface of some form
    If you are using internet VOIP services, you'll need a reliable internet connection.

    Handsets - if you want to reduce cables on the desk, get PoE enabled phones, and a PoE switch or injector for them.

    Have a look around the forum, there are a few similar questions from other posters with detailed answers.

  5. Thanks to localzuk from:

    HodgeHi (12th May 2009)

  6. #4

    Join Date
    May 2006
    Location
    West Bromwich
    Posts
    2,191
    Thank Post
    299
    Thanked 215 Times in 185 Posts
    Rep Power
    56
    Thanks for the offer. We have now though decided to just send the voice data over the cat 6 cabling and terminate at the switchbox. The guy called it sending voice over data rather than voice over IP since the IP protocol isn't going to be used.

    The rj45 at the user end will be converted to a standard phone socket. Thi sis how i understood it anyhow.

  7. #5

    powdarrmonkey's Avatar
    Join Date
    Feb 2008
    Location
    Alcester, Warwickshire
    Posts
    4,859
    Thank Post
    412
    Thanked 777 Times in 650 Posts
    Rep Power
    182
    Quote Originally Posted by HodgeHi View Post
    Thanks for the offer. We have now though decided to just send the voice data over the cat 6 cabling and terminate at the switchbox. The guy called it sending voice over data rather than voice over IP since the IP protocol isn't going to be used.

    The rj45 at the user end will be converted to a standard phone socket. Thi sis how i understood it anyhow.
    <pedantry> Hmm, voice-over-copper is what I'd call it, all you're doing is re-using your existing cable instead of laying new.</pedantry>

    Think of it like putting in an extension at home, you're just using a different type of cable to meet the same end.

  8. Thanks to powdarrmonkey from:

    HodgeHi (14th May 2009)

  9. #6

    john's Avatar
    Join Date
    Sep 2005
    Location
    London
    Posts
    10,619
    Thank Post
    1,499
    Thanked 1,053 Times in 922 Posts
    Rep Power
    304
    Quote Originally Posted by HodgeHi View Post
    Thanks for the offer. We have now though decided to just send the voice data over the cat 6 cabling and terminate at the switchbox. The guy called it sending voice over data rather than voice over IP since the IP protocol isn't going to be used.

    The rj45 at the user end will be converted to a standard phone socket. Thi sis how i understood it anyhow.
    Structured Cabling is the term, its what modern installs should be (looks at my place and shakes head that we still run seperate phone points but not any more )

  10. Thanks to john from:

    HodgeHi (14th May 2009)

  11. #7

    nephilim's Avatar
    Join Date
    Nov 2008
    Location
    Dunstable
    Posts
    12,026
    Thank Post
    1,631
    Thanked 1,920 Times in 1,419 Posts
    Blog Entries
    2
    Rep Power
    434
    you could always get skype and have it on the PCs/Laptop that requires it?

  12. Thanks to nephilim from:

    HodgeHi (14th May 2009)

  13. #8

    Join Date
    May 2009
    Location
    London
    Posts
    1
    Thank Post
    0
    Thanked 1 Time in 1 Post
    Rep Power
    0
    Hi HodgeHi

    If you change your mind and want to look at a VoIP PBX I can build one for you. I build these for a few IT companies around the south/south east. There are so many ways to do this you may find its better to get some help. It can take up a lot of your time to study all the practical problems and security issues.

    Regards
    Steve

  14. Thanks to capesteve from:

    HodgeHi (14th May 2009)

  15. #9

    Join Date
    Dec 2008
    Location
    Nottingham
    Posts
    575
    Thank Post
    38
    Thanked 115 Times in 105 Posts
    Rep Power
    46
    HodgeHi,

    I'm currently implementing an Asterisk VoIP system within our school. There are several bits you will need to consider:

    Outbound connectivity (as previously mentioned) - we're looking at using an IAX2 trunk to gradwell, which will fail over to a single analogue line in reception if the Net connection/PBX goes down - could do a single analogue line into PBX, but if PBX goes down, then all phone lines lost. Remember to consider the bandwidth implication of VoIP and the other internet usage (maybe an onsite proxy with limited bandwidth - limit to say 2Mb under your net connection), and remember QoS

    Phones - Are you going to be purely using wired phones? An idea we have here is for our site manager, myself, my tech, first aid, and senior management to have wireless phones (for several reasons, one of which being an "emergency line" to senior management to deal with classroom issues). We're also looking at soft phones on teacher's laptops so that they can phone this emergency line if they need it.

    Internal network - QoS, bandwidth, PoE, physical ports available, wireless?

    Although there seem to be a lot of points there, it's quite easy to setup these things. There are a few ready to run Asterisk distributions, which may help you evaluate asterisk a litte (just using soft phones for it here atm until I've tested some inbound calls). Check out Trixbox and AsteriskNow.

    Any questions and I'll do my best to answer them, or google them, there's plenty of info on asterisk about!

  16. #10
    Nick_Parker's Avatar
    Join Date
    Jan 2008
    Location
    Dainfern, South Africa
    Posts
    440
    Thank Post
    95
    Thanked 18 Times in 13 Posts
    Rep Power
    17
    I have a questions and maybe the answer is obvious...

    We've run a single network point to every single classroom and office in our school.
    Is there no way we can use that single point for data and voice?
    I don't mean using skype, I mean, is there a way to connect an IP Phone and a network cable to the same point, or will be need to either run a second line to every class/office or put a switch/hub at the end of every line?

  17. #11

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,808
    Thank Post
    517
    Thanked 2,469 Times in 1,913 Posts
    Blog Entries
    24
    Rep Power
    835
    Quote Originally Posted by Nick_Parker View Post
    I have a questions and maybe the answer is obvious...

    We've run a single network point to every single classroom and office in our school.
    Is there no way we can use that single point for data and voice?
    I don't mean using skype, I mean, is there a way to connect an IP Phone and a network cable to the same point, or will be need to either run a second line to every class/office or put a switch/hub at the end of every line?
    If it is a VOIP phone, as in true VOIP then yes - depending on the phone. Grandstream GXP-2000 phones, for example, have a built in switch - ie. one port in, one port out.

  18. #12
    dirtydog's Avatar
    Join Date
    Sep 2008
    Posts
    302
    Thank Post
    47
    Thanked 29 Times in 16 Posts
    Rep Power
    24
    Quote Originally Posted by localzuk View Post
    If it is a VOIP phone, as in true VOIP then yes - depending on the phone. Grandstream GXP-2000 phones, for example, have a built in switch - ie. one port in, one port out.
    yep most of our Avayas do this so you dont need extra sockets, instead you go Socket -> Phone -> PC
    great idea.

  19. #13
    Sirbendy's Avatar
    Join Date
    Nov 2005
    Posts
    2,298
    Thank Post
    8
    Thanked 203 Times in 154 Posts
    Rep Power
    110
    same with our Cisco 7912s. My PC runs off mine.

  20. #14

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,808
    Thank Post
    517
    Thanked 2,469 Times in 1,913 Posts
    Blog Entries
    24
    Rep Power
    835
    Quote Originally Posted by dirtydog View Post
    yep most of our Avayas do this so you dont need extra sockets, instead you go Socket -> Phone -> PC
    great idea.
    It isn't that good an idea... As it means you end up having to share a single port - which, depending on how you have implemented QoS, could affect that. If you use mac based authentication, it can also cause issues with that...

  21. #15

    Join Date
    Jan 2009
    Location
    England
    Posts
    1,527
    Thank Post
    301
    Thanked 304 Times in 263 Posts
    Rep Power
    83
    Quote Originally Posted by localzuk View Post
    It isn't that good an idea... As it means you end up having to share a single port - which, depending on how you have implemented QoS, could affect that. If you use mac based authentication, it can also cause issues with that...
    I think that the high end Cisco phones have built in QoS tagging so you can tag the phone and data traffic separately.

SHARE:
+ Post New Thread
Page 1 of 2 12 LastLast

Similar Threads

  1. wireles building to building
    By 7andY in forum Wireless Networks
    Replies: 11
    Last Post: 7th January 2009, 05:35 PM
  2. Help Building a new VLE
    By aTEK in forum Virtual Learning Platforms
    Replies: 28
    Last Post: 3rd December 2008, 11:10 PM
  3. VOIP phote system and BSF
    By tosca925 in forum General Chat
    Replies: 2
    Last Post: 1st July 2008, 10:16 AM
  4. Package building.
    By nicholab in forum Educational Software
    Replies: 17
    Last Post: 19th June 2007, 12:14 PM
  5. To VOIP or not to VOIP, that is the question
    By localzuk in forum Wireless Networks
    Replies: 10
    Last Post: 11th December 2006, 10:16 AM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •