The 7705 SAR supports the following service categories:
CBR – Constant Bit Rate
rt-VBR – Real-Time Variable Bit Rate
nrt-VBR –Non-Real-Time Variable Bit Rate
UBR/UBR+MIR – Unspecified Bit Rate with Minimum Cell Rate (UBR is a special case of UBR+MIR where MIR=0)