Cisco MTP and IOS MTP (Studant)

[Daniel Vieceli]

Hello everybody, i'm studying cisco cucm, i new in voice world of cisco, i work with other vendors, i trying understand what is MTP Software and MTP IOS , and what is the difference, i'm reading cisco docs, but not understand basic principle. also i need some help to understand dspfarm... sorry if is basic question..

Thanks.

[Jonathan Schulenberg · Accepted solution]

MTP inter works between signaling mismatches. Unlike a transcoder it cannot modify the audio/video media, only signaling. On IOS an MTP can be done in software by the router CPU (typical) or in hardware using DSPs (expensive). In most cases the correct choice is software and the DSPs are reserved for TDM termination, conferencing, and transcoding if needed.

dspfarm is how you define the characteristics/capacity of an MTP, conference bridge, or transcoder. The dspfarm is then associated to a ccm group to get it registered to CUCM.

[Daniel Vieceli]

Hello Jonathan, some questions, for exemple i can use CUCM as MTP server? i have 1 ISDN PRI with Cisco IOS 2801, but dont have any DSP modules, i can use MTP server to convert TDM to IP direct on CUCM? or i need a router to do it, for example for hardware MTP i can use one cisco 2911 with DSP3 Modules? and i can use a software without DSP modules one same 2911?

Thanks you helping me a lot.

[Terry Cheema · Accepted solution]

You can not use CUCM MTP for Voice Termination or TDM to IP conversion you must have the PVDM/DSP hardware for that. You will need a router hosting DSP resources for that.

You can use software MTP without any DSP resources but for interopreabiliies etc. but not for voice termination.

Read through this section for complete understanding: http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab10/collab10/media.html#pgfId-1045481

Please read through this section of SRND for detailed explanation of MTP: http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab10/collab10/media.html#pgfId-1046314

-Terry

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[Daniel Vieceli]

Thank You you helped me alot in my study journey!!

[Manish Gogna]

+5 to Terry and Jonathan, you can check the Media resources FAQ on Docwiki for some nice info on these type of questions related to media resources

http://docwiki.cisco.com/wiki/CUCM_Media_Resources_FAQ#When_do_I_need_an_MTP.3F.3F

HTH

Manish