I have a customer who wants to set up a paging system with a loud speaker and a ata device should have connacted multiple analog phone just for the purpose of paging.
when he is announcing on the loud speaker he want if someone picks up one of the alanlog phones it should disconnect the loud speaker and it should only be an internal extension to extension conversation.
- First question is what type of loud speaker I should look into
- And second how do I set it up.
Any advise would be appreciated.
It's not exactly what you're
It's not exactly what you're talking about on the paging script, but thought I would throw out that we use one of these at a customer site for sending sip calls to an existing overhead paging system.
You can use an ATA and analog paging equipment
check out
http://www.twacomm.com/catalog/dept_id_95.htm?sid=D6864A8316975760A72AA…
There's several devices $100-$200 that will accept a call, then detect when the call is done and close the loop:
http://www.twacomm.com/catalog/model_PA-2A.htm?sid=00F547E996AB691E403A…
http://www.twacomm.com/catalog/dept_id_168/model_PCM-TIM.htm?sid=00F547…
is there a way to do unmuted
is there a way to do unmuted page or multi device intercom, which is the same thing just rephrased differently,
i have a customer he want to be able to ask in his remote warehouse using page to loud speakers and a ata with numarus analog phones if somebody is there, or whatever, and they should be able to pick up the analog phone and answer back, to avoid the 2 step process of having to call him back
is some thing like this doable at all
basic audio issue
Once a call is placed to the PA, the circuit is live in loop and feeding the speaker. If a microphone is added anywhere in that loop that can 'hear' that speaker, the circuit will go into oscillation (feedback). That's why in the old radio days you could only send or receive but not both at the same time. Same physics still apply.
One thing that can be done, though I really don't like Grandstream, is to use a Grandstream GXP-2000 IP phone. It allows regular SIP call to take a line off-hook and speaker phone, and that is a full duplex speaker phone call. You can do something similar with Polycom but it is much more complex.
to page phones and overhead paging you're using the Page application (which then sends to a MeetMe dynamic conference room) ... all these phones are in a conference room as muted members and they have ALREADY answered the call. Picking up the handset isn't answering the call, its just switching from speaker to handset. What your asking for is some way to know if a device switches between speaker and handset (not information it even shares with anyone else) and then kick every other member out of a conference room and then after all that, un-mute the one phone that switched between speaker and handset which isnt even possible with the Page application. The accoustical feedback from sticking phones in a 2-way conference is quite deafening.
sure what could possibly go wrong with this ;-)
He will have to page someone and they will have to call him back "bob please dial 225.."
as far as speakers, that depends on a lot of factors. Those ethernet speakers are expensive for what they are, but OK for 1 - 2 speaker environments. For anything larger I would have installed (by a speaker professional) a Bogen amplifier paging system with appropriate speakers that wont over-draw from the amplifier. To connect to this system you use a Bogen TAM-B module and you attach an ATA like the SPA-2102 to this module (it converts analog 24v FXS to the 600 ohm audio the amplifier looks for). The vendor that installed the paging system takes ownership of that end, your demarcation is the TAM-B. The trick is not to over draw the amp or you'll end up replacing the amp regularly, thats where load calculation based on ohms and watts comes in and thats usually why we outsource that piece to a professional.