Avaya 03-300430 User Manual

Note:

Refer to 

 in Maintenance Procedures 

(03-300192) for MMCH troubleshooting information.

The Multimedia Interface circuit pack provides a number of H.221 protocol terminations for bit 
streams received from the TDM bus. The Multimedia Interface demultiplexes the H.221 bit 
stream (audio, video, data, control, and indication signals) and transmits the bit streams onto 
the TDM bus to be processed by the appropriate circuit packs.
Each Multimedia Interface circuit pack contains 32 separately maintained “ports,” more 
commonly referred to as “resources.” MMI-PT represents one of these 32 resources. At system 
boot or when the circuit pack is inserted, 32 resources are inserted into the system.
The MMI circuit pack contains 4 Digital Signal Processors (DSPs) which manage the 32 
resources. These resources are directly mapped to DSPs:

All 8 resources that the circuit pack controls may be placed out of service by the failure of one of 
these DSPs.

MMI-PT

MAJ

test port location l r#

Multimedia Interface Port

MMI-PT

MIN

test port location l r#

Multimedia Interface Port

MMI-PT

WRN

test port location l r#

Multimedia Interface Port

1–8

DSP1

9–16

DSP2

17–24

DSP3

25–32

DSP4