asterisk users - May 2020 - Notification when on the phone

Everybody,

I've had a request from my manager that I figure out how to get our Asterisk
13.x system using chan_sip to be able to display on the Polycom VVX series phone
display (firmware 5.9.5), when an extension is called and the person on the
other end is on the phone.

He said, "Our old Analog phone system could do it, how hard can it
be?"

I've gone down the path of trying to use MessageSend, but for the life of
me, cannot get the VVX 501 or VVX 601 phones to enable Instant messaging,
Enabling the feature with feature.instantMessaging.enabled="1" seems
to do nothing.

Further investigation shows that I can send messages to the phones using curl
after enabling Push messaging.  This works easy enough, but figured I'd ask
others if they are doing something similar and maybe I can avoid re-inventing
the wheel.

All comments are welcome!

Doug

On 2020-05-28 10:15, Doug Lytle wrote:
> Everybody,
> 
> I've had a request from my manager that I figure out how to get our
Asterisk 13.x system using chan_sip to be able to display on the Polycom VVX
series phone display (firmware 5.9.5), when an extension is called and the
person on the other end is on the phone.
> 
> He said, "Our old Analog phone system could do it, how hard can it
be?"
> 
> I've gone down the path of trying to use MessageSend, but for the life
of me, cannot get the VVX 501 or VVX 601 phones to enable Instant messaging,
Enabling the feature with feature.instantMessaging.enabled="1" seems
to do nothing.
> 
> Further investigation shows that I can send messages to the phones using
curl after enabling Push messaging.  This works easy enough, but figured I'd
ask others if they are doing something similar and maybe I can avoid
re-inventing the wheel.
> 
> All comments are welcome!
> 
> Doug
> 
Push messaging with curl is nice for broadcasting text messages to idle phones.

But if you've already got the caller on the phone, then you might consider
the CONNECTEDLINE function in Asterisk...

	same => n,Set(CONNECTEDLINE(name)=User is Busy)

...sort of 'Reverse Caller ID Name' to immediately change what the
caller sees on their phone display.

More involved is the CALLCOMPLETION function eg. for automating redials to the
busy user when they hang up their call (see the ccss.conf.sample file.)

Kind Regards,

-- 
🤠 C. Maj, Technology Captain @ Penguin PBX Solutions
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>>> But if you've already got the caller on the phone, then you
might consider the CONNECTEDLINE function in Asterisk...
And that we don't.

It's the third party that would like the notification the the destination
phone is currently busy with another call.  CONNECTEDLINE only functions after a
channel has been answered. I was successful with using CONNECTEDLINE when
issuing an Answer() first, but it added delay and the displayed message
didn't show for very long.

And, with the Polycom phones setup with multi-line, a call never rings busy
unless the user press the DND (Do not disturb) button.

Doug