Conferencing and Transcoding

is the following correct
1) you need to configure HW transcoder if you are using multiple codecs within CM (reigions)
2) you need to add a HW conference bridge when you require more conference resources.
does any one have details on HW conferences and transcoders.

Hi
1) Maybe - it depends what devices/software you are using. For example - if you have Cisco IP Phones on all sites, or Cisco Gateways, they will all support G729 or G711 (assuming you have sufficient DSPs on your gateways). So if you are calling between two phones or a phone and a gateway no transcoder would be required.
If you called from a phone into an IPCC port and IPCC could only support G711, and the phone and IPCC port were in regions that were limited to G729... Then a trancoder in the site that IPCC is in would be required.
2) CallManager supports quite a lot of conference participants in software - you can even have a dedicated node in the cluster providing conference services. The Callmanager software conference bridge is another service that only supports G711 however - so you would either need a transcoder to support G729 conferencing or a hardware conference bridge as you suggest.
HW conference/transcoders can be the same device - the most common types are standard Cisco gateways (e.g. a 2800) with lots of PVDM2 DSP cards.
This SRND section goes into some detail on this subject:
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_implementation_design_guide_chapter09186a008044750d.html#wp1043113
Regards
Aaron
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