[asterisk-users] Polycom DND + Intercom/Paging Override?

John Kiniston johnkiniston at gmail.com
Thu Sep 18 12:30:59 CDT 2014

On Wed, Sep 17, 2014 at 10:06 PM, Nathan Anderson <nathana at fsr.com> wrote:

> BUT Polycom handsets cannot be configured to just listen to RTP being
> multicasted to a particular multicast IP like many other IP phones
> can...the signalling for Polycom multicast paging and PTT functionality is
> completely proprietary and not SIP-based, and in fact the audio itself is
> not RTP.  It is a proprietary audio packet format that has a header
> prefixed to it containing signalling information, on every audio
> packet/frame.  Therefore nothing else can initiate a multicast page except
> another Polycom phone on the same layer 2 broadcast domain...you cannot
> programmatically have Asterisk/FreePBX do this.

There is one product that I know of that is Compatible with Polycom paging.
The Algo 8180 Audio Alerter.


You can call it via SIP from asterisk and it can multicast in the special
Polycom format to your phones.

A human being should be able to change a diaper, plan an invasion, butcher
a hog, conn a ship, design a building, write a sonnet, balance accounts,
build a wall, set a bone, comfort the dying, take orders, give orders,
cooperate, act alone, solve equations, analyze a new problem, pitch manure,
program a computer, cook a tasty meal, fight efficiently, die gallantly.
Specialization is for insects.
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