[Asterisk-Users] Overhead Paging

[Deon Rodden]

I have several Cisco 7940's laying around, how do I piple the 
speakerphone through external speakers? I understand the amplifier part, 
but how do you get RCA/2.5mm outputs from the Cisco?

For now, we just configured a "line 2" on all our phones with auto 
answer and, using the trick found in the wiki, when we page, every phone 
turns on and broadcasts whatever we say. However, there is an antiquated 
speaker system in the ceiling above that nobody knows anything about, 
it'd be neat to pipe a dedicated 7940 with Auto-Answer to the above 
Intercom.

Rich Adamson wrote:

>>I am currently implementing a VoIP PBX, and need to deal with the paging 
>>situation.  I would prefer to do paging via overhead speakers.
>>
>>My plan is to connect a "Paging Unit" to an FXS port of an IAD, and assign an 
>>extension to that port.  I would then simply be able to call that extension, and 
>>have my call patched through to the overhead speakers.
>>
>>Has anyone implemented this type of setup, if so, what type of paging unit did 
>>you deploy, did you require an external amplifier or power supply, and how many 
>>speakers were you able to connect to the unit?  As it stands, I will need 
>>between 4 and 8 speakers, and some of the speakers will be 400 feet from the 
>>main telco closet.
>>
>>Any thoughts, comments, and suggestions that you can shed on this topic would be 
>>much appreciated.  If you have other methods of implementing overhead paging, I 
>>would also be interested.
>>    
>>
>
>If you search the archives I think you'll find this discussed several
>times.
>
>One (of many) ways to accomplish it is simply based on using a Cisco
>7940/7960 phone configured with paging, and pipe the audio to an
>amplifier input. If you're planning on deploying the Cisco phones
>already, then using that approach basically has built-in sparing
>covered.
>
>
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