Nortel DMS-100 Series Maintenance Manual page 180

4-12 ESA maintenance overview
Figure 5 ESA CC basic call processing structure
Maintenance
Requests
Terminal
Processing Task
(TPT)
Server
ESA CC Queue
Call Process
Controller
(CPC)
Supervision
Sender (SS)
Each line can have more than one call processing line state. The call
processing line states determine what the system does with a specified
297-8361-550 Standard 04.02 December 2004
A terminal sends maintenance
requests and event messages (like
digit collection, on-hook, off-hook)
to the TPT.
The TPT sends messages to the
server for coding or decoding.
The server sends messages to the
ESA CC queue. The queue order
is first-in first-out.
The ESA CC queue sends
messages to the CPC for call
processing. The system gathers
terminal data from the translation
data tables and terminal status table
(TST). The CPC looks at the TST to
determine the state of the line and
what message templates to create.
The CPC collects digits in the
translation facilities and determines
if enough digits are collected. The
static data allows the CPC to
perform translations.
Translation
Data Tables
The SS takes the message
templates to create work requests
(like collecting digits, applying dial
tone) to send to the server.