Sending location information of Multicast Page

[elin@klhconsulting]

Is it possible to send the extension of the phone (or other customized information) to listening phones when multicast paging?

Let's say I'm multicast paging from extn 626. On the listening phone this is what I see on the phone display:

page all
224.5.6.20:10008

This information is set in NDP on the LISTENING phone as follows:

multicast.listen_address.1.ip_address="224.5.6.20:10008"
multicast.listen_address.1.label="page all"

Here are the Yealink overrides on the sending phone:

linekey.7.value="224.5.6.20:10008"
linekey.7.label="EdwinPaging"

All the linekey.7.label="EdwinPaging" override does is label to button on the phone. What I want to do when I multicast page is send information to the other phones that identifies which phone I'm initiating the page from, since multicast paging is one-way and the listeners won't know which phone the user is paging from.

Anyone know if this is possible to do? Thanks for looking at this.