MOH Issues and Resolution

There are quite a few issues which you may come across while configuring Music on Hold. As of SRST/ITS 3.0 an IOS branch gateway has the capability to function as a multicast Music on Hold (MoH) resource. This allows for a distributed MoH design where MoH at remote sites is provided by the local gateway, which can save valuable bandwidth by not having to stream MoH across the WAN. The MoH capabilities of IOS are very simple. IOS can be configured to permanently multicast RTP packets from an audio file stored locally on flash. This multicasting/streaming is not under the … Continue reading MOH Issues and Resolution

MOH Configuration

Music on hold is a very useful feature in Call manager which is used for streaming music when you put a PSTN phone or an internal IP phone on hold. I will discuss briefly how it is configured and how you may use CUCM to stream music from remote gateways. Go to Media Resources > Music on Hold Source Check the box ‘Allow Multicasting’  Go to Media Resources > Music on Hold Server Select the device pool – DP-MOH (This device pool should have a region REG-MOH which has G711 codec with all other regions Create a MRG and select … Continue reading MOH Configuration

Hardware Conferencing

To make use of DSP resources for a Conference Call, we will have to enable Conference Bridge at the gateway. Configure the following at the gateway: voice-card 0 dspfarm dsp services dspfarm sccp local Loopback0 sccp ccm 10.10.210.10 identifier 2 priority 2 version 5.0.1 sccp ccm 10.10.210.11 identifier 1 priority 1 version 5.0.1 sccp ! sccp ccm group 1 bind interface Loopback0 associate ccm 1 priority 1 associate ccm 2 priority 2 associate profile 1 register HQ-conf  << Name must match at CUCM ! dspfarm profile 1 conference codec g729r8 maximum sessions 2 associate application SCCP no shut  << Very … Continue reading Hardware Conferencing

IOS Transcoding

Transcoding is required to enable communication between different Codecs. For example, CUE is G.711 only and will not be reachable from a Branch side if Inter-region codec has been set as G.729. Similarly a UCCX Pilot point is G.711 only and cannot be reached from another site using G.729 codec. To make this communication possible, a transcoder sitting at terminating gateway do media conversion from one codec to another. Setting up a IOS transcoder is same as Conference Bridge. At the gateway use the following commands: voice-card 0 dspfarm dsp services dspfarm sccp local Loopback0 sccp ccm 10.10.210.10 identifier 2 … Continue reading IOS Transcoding

Hardware Conferencing in SRST mode (CBarge)

In a scenario where a customer wants to enable Hardware conferencing while in SRST for CBarge as well as in normal operation. We can configure this by registering the conference bridge first to the Call managers and then to the telephony service IP source address. In this way when the gateway will go in SRST, its Conference bridge will register with telephony-service (CME) thus enabling the Conference Bridge for use. ! voice-card 0 dspfarm dsp services dspfarm ! sccp local Loopback0 sccp ccm 10.10.210.11 identifier 1 priority 1 version 6.0   << Primary Call manager sccp ccm 10.10.210.10 identifier 2 priority … Continue reading Hardware Conferencing in SRST mode (CBarge)