[SIPForum-discussion] Busy Lamp Field (BLF) and Presence

[Vivek Batra]

Hi Blake/ Andrea,

Do you have any ethereal trace for the same since I do not find any standard
for BLF OR please recommend the path that how to test this feature.

 

Regards,

Vivek Batra 

 

  _____  

From: Blake Coleman [mailto:blake.coleman21 at gmail.com] 
Sent: Saturday, November 29, 2008 2:44 AM
To: Vivek Batra
Subject: Re: [SIPForum-discussion] Busy Lamp Field (BLF) and Presence

 

I have tested this. It uses a subscribe SIP messages to notify the phone
monitoring other device.
The best way to use this feature is via SIP with TCP support.


~Blake


On Nov 28, 2008, at 4:27 AM, "Vivek Batra" <Vivek.Batra at matrixtelesol.com>
wrote:

Hi,

Anyone has idea about the functioning of BLF (Busy Lamp Field) in IP Phone.
How the central entity (B2BUA) updates the IP Phone about the status (viz
Ringing, Idle, Busy) of other numbers which IP Phone wants to monitor? Does
it works using SUBSCRIBE/ NOTIFY mechanism?

Is BLF feature same as of *Presence*?

 

Best Regards,

Vivek Batra

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