# MUX and DEMUX capabilities

The MUX and DEMUX ( DPF) data processing DSP function implements a selective subset of the capabilities described in the ITU H.223 specification and H.324 specification for CCSRL/ NSRP.

The following table summarizes the multiplexer-supported features:

Specification | Features | Supported | Not supported
H.223 | Multiplexer | X |
AL1 protocol | X |
AL2 protocol | X |
AL3 protocol (no re-transmission) | X |
H.223 Annex A | Multiplexer double flag Mode |  | X
H.223 Annex B | Golay coding for multiplexer header stuffing PM synchronization | X |
H.223 Annex C | Additional error reduction capabilities |  | X
H.223 Annex D | Additional error reduction capabilities |  | X
H.324 Annex A, Annex C | CCSRL/NSRP/WNSRP | X |
H.324 Annex K | MONA | X |