Cisco TANDBERG?150MXP Manual de usuario descargar pdf (Pagina 12)

TANDBERG TANDBERG and Cisco CallManager

D13907.01

4 TANDBERG H.323 endpoints and Cisco CallManager

At the moment the H.323 protocol is the most mature protocol for visual communications over an IP

network. Most of today’s video conferencing vendors have support for the H.323 protocol in their

products. As such, users of professional video conferences most often choose equipment that provides

support for H.323 because this protocol offers high video resolution, multiple video streams, high quality

audio, secure content and other features that make H.323 more attractive than other protocols.

In order to bridge H.323 and SCCP together, Cisco has included support for H.323 within CallManager,

thereby allowing endpoints that support each type of communications protocol to interoperate with each

other and allow for visual communications across disciplines. There are two ways of configuring the

network to allow for calls between a H.323 endpoint and a SCCP endpoint. You can either register the

H.323 endpoints directly to the CallManager or you can register the H.323 endpoint and a CallManager

trunk to a Gatekeeper, the differences between these two configurations will be discussed later in this

chapter.

No H.323 endpoint supports SCCP directly, meaning it is not possible to use these endpoints the same

way as you do with a Cisco IP phone. For example, these endpoints will not be able to transfer a call,

place a call on hold, park a call, access services on CallManager or take advantage of the other features

made possible by Cisco CallManager. However, H.323 endpoints that support Empty Capabilities Set

(ECS) will be able to fully function in conjunction with SCCP devices by supporting the ability for the far

end to place it on hold, transfer it, etc. By supporting ECS, an endpoint will allow the far end to terminate

all active audio and video streams to that site without having the overall call fail (the endpoint will just sit

idle waiting for these streams to re-establish). By supporting ECS, an H.323 endpoint will be able to

connect to an endpoint that supports SCCP and the SCCP unit itself will not notice a discernable

difference between the two protocols. Because of the lack of ability to support the advanced features such

as hold and transfer, any endpoint that supports ECS should not be mistaken for an endpoint that supports

SCCP directly.

Note: All TANDBERG MXP video endpoints support Empty Capability Set

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Cisco TANDBERG?150MXP Manual de usuario Pagina 12