Introduction
This document covers the procedures for configuring conferencing and transcoding support on Cisco IOS voice gateways. The procedures that you perform depend on the type of voice network module you are using to allocate DSP resources.
Determining DSP Resource Requirements
DSPs reside either directly on a voice network module, such as the NM-HD-2VE, on PVDM2s that are installed in a voice network module, such as the NM-HDV2, or on PVDM2s that are installed directly onto the motherboard, such as on the Cisco 2800 and 3800 series voice gateway routers. You must determine the number of PVDM2s or network modules that are required to support your conferencing and transcoding services and install the modules on your router.
STEPS
1. Determine performance requirements.
2. Determine the number of DSPs that are required.
3. Determine the number of network modules that are supportable.
4. Verify your solution.
5. Install hardware.
DSP Calculator
In regards to calculating DSP`s, there is already a tool for that
http://www.cisco.com/web/applicat/dsprecal/dsp_calc.html
Enabling SCCP on the Cisco Unified Communications Manager Interface
Perform this task to enable SCCP on the local interface that the voice gateway uses to communicate with Cisco Unified Communications Manager.
Configuration
1. enable
2. configure terminal
3. sccp ccm {ip-address | dns} identifier identifier-number [port port-number] [version version-number]
or
sccp ccm {ip-address | dns} priority priority [port port-number] [version version-number]
4. sccp local interface-type interface-number
5. sccp ip precedence value
6. sccp
7. exit
Configuring Enhanced Conferencing and Transcoding
Perform the following procedures to configure enhanced conferencing and transcoding on the NM-HDV2, NM-HD-1V, NM-HD-2V, NM-HD-2VE, or PVDM2:
Configuring a DSP Farm Profile
Perform this procedure to define a DSP farm on the NM-HDV2, NM-HD-1V, NM-HD-2V, NM-HD-2VE, or PVDM2. You must configure each conferencing, transcoding, and MTP profile separately.
Prerequisites:
Requires Cisco IOS Release 12.3(8)T or a later release. Universal transcoding requires Cisco IOS Release 12.4(11)XY or a later release.
Configuration
1. enable
2. configure terminal
3. voice-card slot
4. dsp services dspfarm
5. exit
6. dspfarm profile profile-identifier {conference | mtp | transcode [universal]}
7. description text
8. codec codec-type
9. maximum sessions number
or
maximum sessions {hardware | software} number
10. associate application sccp
11. no shutdown
12. exit
13. gateway
14. timer receive-rtp seconds
15. exit
Associating a DSP Farm Profile to a Cisco Unified Communications Manager Group
Perform this procedure to define a Cisco Unified Communications Manager group and to associate a DSP farm profile with the Cisco Unified Communications Manager group.
Prerequisites:
This procedure requires Cisco IOS Release 12.3(8)T or later release.
Configuration
1. enable
2. configure terminal
3. sccp ccm group group-number
4. associate ccm identifier-number priority priority-number
5. associate profile profile-identifier register device-name
6. bind interface interface-type interface-number
7. description string
8. end
Verifying DSP Farm Configuration
To verify conferencing, transcoding, and MTP services, perform the following steps.
1. show running-config
2. show sccp ccm group [group-number]
3. show dspfarm profile [profile-number]
4. show dspfarm all
5. show sccp
6. show sccp connections
7. show media resource status
Related Information
