An annunciator is a software function of the cisco ip voice media streaming application that provides the ability to stream spoken messages or various call progress tones from the system to a user. Hello, i been reading cisco documents about mtp on call manager and transcoder with mtp. Assuming you already have a transcoder registered to your cucm, youll want to set mtp required on your sip trunk to set the mtp prefered codec to g711. My advice is save these resources for transcoding or conferencing for which dsps. You can verify where the cube terminated the media to from the ip using the either. Figure 71 shows how a media resource such as a transcoder may be placed in the. Hardware resources required for correct interaction of cucm and the bt sip trunk.
If no transcoder were available, phone d would ring, but as soon as the call was answered, the call would disconnect. Sample configuration for cisco ios hardware transcoding is as follows. Cisco cube isr guide for secure transcoding to sipencrypt. Allocation of conferencing resources is covered in further detail later in this chapter. A transcoder converts an input audio stream using one audio codec into an.
Mtps are a required option on the cucm h323 or sip trunkgateway that. It uses sccp messages to establish rtp streams, and it can send multiple oneway rtp streams to devices such as cisco ip phones or gateways. An xcoder is an mtp also so it can be allocated for this purpose. You will have to ensure that you assign all your cucm media resources are assigned to a mrg, then exclude the mrg from the mrgl assigned to your cti devices. Cisco recommends placing a transcoder local at each site where it might be required. Software mtps allow cisco unified communications manager to relay calls that are routed through sip or h. Media resource support cisco unified cisco certified expert. The cisco call manager ippbx makes use of isr routers as a platform for services that. System configuration guide for cisco unified communications. Cisco ios enhanced software mtp is sufficient for sip trunking purposes. Crestron product development software is licensed to crestron dealers and.
Configure transcoders and media termination points. Cucm service parameters required for correct sip behaviour with regards to the. Sample configuration for cisco ios enhanced software mtp is as follows. If the primary cisco unified communications manager node fails, the transcoder attempts to register with the next available node in the cisco unified communications manager group that is specified for the device pool to which the transcoder belongs.
Cucm service parameters required for correct sip behaviour with regards to the bt sip. Make sure that the region mapping between your sip trunk and xcoder are g711 and the xcoder to branch phone is g729. All, i was wondering please for a bit of fundamental help understanding a call flow involving an itsp and a codec mismatch, with the possible use of a transcoder. Cisco callmanager would need to allocate a transcoding resource so audio would flow as g. Cisco bib jtapi configuration call recording reference. Note that repacketization requires dsp resources in a cisco ios mtp. With this default configuration, an incoming call on a sip early offer trunk.
Ube provided the dsp resources required by the cisco ucm for transcoding. Specifically the cisco ios software is configured to route voip calls. My understanding that mtp is run on call manager to have different devices codecs such as g711 and g729 deceives communicate with other. When inserted into a call, the transcoder converts the data streams between the two incompatible codecs to enable communications between them. Cisco unified communications manager system guide, release. Before you register the secure universal transcoder to the cisco unified border element, you should. If the call was successful, then it is most likely that cucm software mtp was invoked.