Cisco Cisco TelePresence Video Communication Server Expressway
Appendix 7: Additional information
B2BUA registration on “Lync gateway” VCSs
The B2BUA FindMe registration function allows personal video endpoints to appear in a similar manner to an
endpoint registered directly to Lync Server with the same credentials as an existing Lync user, but still
maintain the benefits of having the endpoint register to the VCS which is designed to support video calling.
endpoint registered directly to Lync Server with the same credentials as an existing Lync user, but still
maintain the benefits of having the endpoint register to the VCS which is designed to support video calling.
The B2BUA registration function also means that the user credentials are no longer needed on each
individual video endpoint. This is possible because the VCS B2BUA is configured as a trusted host to Lync
Server. This simplifies the long term endpoint management since passwords do not need to be regularly
updated on the video endpoints.
individual video endpoint. This is possible because the VCS B2BUA is configured as a trusted host to Lync
Server. This simplifies the long term endpoint management since passwords do not need to be regularly
updated on the video endpoints.
What does “Register FindMe users as clients on Lync” do?
When enabled, FindMe users that are in the shared domain with Lync are registered to Lync Server so that
they appear like Lync clients.
they appear like Lync clients.
This means that if a Lync client registers to Lync Server, and a FindMe user is registered as that same user
to Lync Server, when the user is called by another Lync client, the call will be forked to both the registered
Lync client and also to the VCS’s FindMe. This means that Lync clients and all video endpoints configured as
primary devices in the FindMe will ring when called at the Lync client address.
to Lync Server, when the user is called by another Lync client, the call will be forked to both the registered
Lync client and also to the VCS’s FindMe. This means that Lync clients and all video endpoints configured as
primary devices in the FindMe will ring when called at the Lync client address.
Without registering the shared domain FindMe user, Lync Server will not fork the call to VCS, but:
n
if a Lync client is registered with the called address then just that Lync client will ring.
n
if there is no Lync client registered but there is a static domain route to the VCS for that domain the call will
be routed to VCS to handle.
be routed to VCS to handle.
n
if there is no Lync client registered and there is no static domain route for this call then the call will just fail.
Lync Server only allows FindMe users to register if the FindMe ID being registered is a valid user in the Lync
Active Directory (in the same way that Lync clients can only register if they have a valid account enabled in
the Lync AD).
Active Directory (in the same way that Lync clients can only register if they have a valid account enabled in
the Lync AD).
Registering FindMe users also allows the presence of these users to be provided to Lync Server and for ‘in-
call’ as well as ‘available’ and ‘off-line’ status to be provided. Endpoint devices and FindMe entries that are
not registered to Lync Server can only communicate ‘available’ and ‘off-line’ status to Lync Server. The “Lync
gateway” VCS (or VCSs) must host the presence server for the domain shared with Lync (ciscotp.com) in
order for presence to be provided to Lync Server.
call’ as well as ‘available’ and ‘off-line’ status to be provided. Endpoint devices and FindMe entries that are
not registered to Lync Server can only communicate ‘available’ and ‘off-line’ status to Lync Server. The “Lync
gateway” VCS (or VCSs) must host the presence server for the domain shared with Lync (ciscotp.com) in
order for presence to be provided to Lync Server.
The “Lync gateway” VCS must also host the presence server for the domain of the video network
(vc.ciscotp.com). This is because presence of a FindMe entry can only be provided if the presence status of
the device(s) in the active location of the FindMe entry are hosted on the “Lync gateway” VCS. If FindMe
entries contain multiple devices in the active location, VCS will aggregate the presence of those devices
whose presence is hosted on the “Lync gateway” VCS and present the appropriate overall presence status.
(vc.ciscotp.com). This is because presence of a FindMe entry can only be provided if the presence status of
the device(s) in the active location of the FindMe entry are hosted on the “Lync gateway” VCS. If FindMe
entries contain multiple devices in the active location, VCS will aggregate the presence of those devices
whose presence is hosted on the “Lync gateway” VCS and present the appropriate overall presence status.
Use of FindMe also allows any endpoint that is referred to in the FindMe to take on the caller ID of that
FindMe entry. This means that whichever video endpoint makes the call, the receiving Lync client and video
endpoints will see the call as having come from the FindMe ID. This is especially useful when the called
party wants to return the call; the return call calls the FindMe ID resulting in all endpoints relating to this
FindMe and any Lync clients registered with this ID all ringing simultaneously – rather than the return call
being addressed directly to the single endpoint that made the call.
FindMe entry. This means that whichever video endpoint makes the call, the receiving Lync client and video
endpoints will see the call as having come from the FindMe ID. This is especially useful when the called
party wants to return the call; the return call calls the FindMe ID resulting in all endpoints relating to this
FindMe and any Lync clients registered with this ID all ringing simultaneously – rather than the return call
being addressed directly to the single endpoint that made the call.
Cisco TelePresence Microsoft Lync and Cisco VCS Deployment Guide (X8.5)
Page 80 of 83
Appendix 7: Additional information