Channel filter summary

MSPP channels consist of one or more channel filters, where each filter performs a specific processing task. The MSPP API supports the following channel filters:

Channel filter	Description
Jitter	Performs packet reordering and provides a buffering mechanism for smoothing jitter in packet media streams.
RTP switching	Acts as a pass-through filter to transfer data from one RTP IPv4 or IPv6 endpoint to another.
T.38 fax relay	Carries fax data between DS0 and T38UDP endpoints by performing fax data modulation and demodulation.
Voice decoder	Decodes and decompresses voice data. MSPP voice decoder filters include: G711 decoder: 64 kbps mu-law or A-law decoder G723.1 decoder: 6.4/5.3 kbit/s decoder G726 decoder: 32 kbit/s decoder G729A decoder: 8.0 kbit/s decoder
Voice encoder	Encodes and compresses voice data. MSPP voice encoder filters include: G711 encoder: 64 kbit/s mu-law or A-law encoder G723.1 encoder: 6.4/5.3 kbit/s encoder G726 encoder: 32 kbit/s encoder G729A encoder: 8.0 kbit/s encoder