[Asterisk-Users] Multi-line help

[Siggi Langauf]

On Mon, 5 Jan 2004, Philipp von Klitzing wrote:

> Am I correct by stating that as of now none of the VoIP protocols (SIP,
> MGCP, H.323, Skinny) supports such a "silent ring" feature? Would SIMPLE
> solve this? Naturally I wouldn't like those calls to show up in my list
> of unanswered calls. For the more expensive phones I guess you can assign
> a silent ring tone to specifc lines or caller IDs, but that'd only get me
> half the way.

Well, Skinny, as a protocol, supports this. (You have to tell the phone
explicitly, what state, caller ID and Name to show, if, and with which
distinctive tone to ring, to flash the ring indicator, etc.
You could even signal incoming calles as a status message and tell the
phone to show a button template that contains some "PickUp" button.

However, none of these features is supported in any Skinny Channel (and
not in Cisco's CallManager, either) at this time.
Many phone systems do support the notion of a "silent ring only line",
though. (CCM can do this with Skinny phones, most multiline SIP or H.323
phones have some silent ring option for particular lines, ...)

SIMPLE would allow this too. But then, I do not know a single hardphone
that supports SIMPLE.

Cheers,
	Siggi