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DEPI – MPT Mode • Overview
APEX1000 All-Purpose Edge QAM Software Version 2.4.x • Installation and Operation Manual
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573408-001-a
M-CMTS Architecture
The M-CMTS architecture includes the following components:
• A DEPI interface to configure DOCSIS data to be broadcasted by APEX output
transport streams
• A DTI interface to receive a common time reference for DOCSIS data within the
whole head end
• An ERMI interface* to register and allow reservation of QAM channels within the
EQAM entity
These interfaces allow an external Edge QAM to provide the downstream path for the
DOCSIS data and MAC messages being sent to the Cable Modems.
*Note: Version 2.4.x does not support ERMI functionality; control connections / sessions
for DEPI interface are configured statically. This feature will be supported in a future
release.
DEPI Control Connections
Use this window to define the parameters which control the delivery of DOCSIS frames
from the M-CMTS core to the EQAM devices:
Figure 11-1 — DEPI Control Connections window
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