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MTP Point on Cisco h323 gateway

What is the advantage/benefit of using media termination point on h323 gateway?

Cisco Employee

MTP Point on Cisco h323 gateway

I can't seem to remember the advantages and disadvantages of MTP. What's the call flow like?

Media Termination Points extend supplementary services, such as call  hold, call transfer, call park, and conferencing, that are otherwise not  available when a call is routed to an H.323 endpoint. Some H.323  gateways may require that calls use an MTP to enable supplementary call  services, but normally, Cisco IOS gateways do not.

The Cisco IP Voice Media Streaming Application MTP accepts two  full-duplex G.711 Coder-Decoder (CODEC) stream connections. MTPs bridge  the media streams between two connections. The streaming data that is  received from the input stream on one connection passes to the output  stream on the other connection and vice versa. In addition, the MTP  trancodes a-law to mu-law (and vice versa) and adjusts packet sizes as  required by the two connections.

Each MTP belongs to a device pool, which specifies, in priority order,  the list of Cisco Unified Communications Managers to which the devices  that are members of the device pool should attempt to register. This  list represents a Cisco Unified Communications Manager group. The first  Cisco Unified Communications Manager in the list specifies a device  primary Cisco Unified Communications Manager.

An MTP device always registers with its primary Cisco Unified  Communications Manager if that Cisco Unified Communications Manager is  available and informs the Cisco Unified Communications Manager about how  many MTP resources it supports. The Cisco Unified Communications  Manager controls MTP resources. You can register multiple MTPs with the  same Cisco Unified Communications Manager. When more than one MTP is  registered with a given Cisco Unified Communications Manager, that Cisco  Unified Communications Manager controls the set of resources for each  MTP. You can also distribute the MTPs across a networked system as  desired.

For example, consider MTP server 1 as configured for 48 MTP resources,  and the MTP server 2 as configured for 24 resources. If both MTPs  register with the same Cisco Unified Communications Manager, that Cisco  Unified Communications Manager maintains both sets of resources for a  total of 72 registered MTP resources.

When the Cisco Unified Communications Manager determines that a call  endpoint requires an MTP, it allocates an MTP resource from the MTP that  has the least active streams. That MTP resource gets inserted into the  call on behalf of the endpoint. MTP resource use remains invisible to  both the users of the system and to the endpoint on whose behalf it was  inserted. If an MTP resource is not available when it is needed, the  call connects without using an MTP resource, and that call does not have  supplementary services.

Make sure that the Cisco IP Voice Media Streaming application is  activated and running on the server on which the MTP device is  configured.

The Cisco IP Voice Media Streaming application, which is common to the  MTP, Conference Bridge, annunciator, and Music On Hold applications,  runs as a CM service.

You can add an MTP device in two ways:

You  automatically add an MTP device when you activate the Cisco IP Voice  Media Streaming Application service from Cisco Unified Serviceability.

You  can manually install the Cisco IP Voice Media Streaming Application on a  networked server and configure an MTP device on that server through  Cisco Unified Communications Manager Administration.

Not all call flows require an MTP. Do have DTMF problems? DTMF Mismatches etc?


MTP Point on Cisco h323 gateway

Do i need to check Media Termiantion point required option on gateway webpage of CUCM 7 ??? because i am unable to hear voice when call comes from pstn to cue AA.

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