Voice Services Overview
The Adaptive Services PIC includes a voice services feature that allows you to specify a particular type of logical interface to accommodate voice over IP traffic. This interface uses the compressed real-time transport protocol (RTP), which is defined in the following standard:
Compressed RTP enables voice traffic to use low-speed links more effectively by compressing the 40-byte IP/UDP/RTP header down to 2 to 4 bytes in most cases.
Voice services on the AS PIC support single-link Multilink PPP (MLPPP)-encapsulated IPv4 traffic over T1, E1, and T3 physical interfaces.