This object specifies the CODEC type to be used for Voice
Band Data (VBD) upspeed.
Upspeed is to change the transmission rate of a voice
interface to a higher rate of CODEC type for fax/modem
transportation.
This object is applicable when catmtCidNx64Enable is
is set to 'false'. It is used for voice trunking applications
only.
This object is mandatory when adding a voice trunking CID
entry.