Nortel DMS-10 Series Installation, Operation And Maintenance Manual page 88

2-60 Section 060-INDP-111 System Description
The ECAC initiates a Processor switch when the current error count in the
active Processor exceeds sixteen (16), generates the appropriate alarm, and
outputs the following error message to the terminal; refer to the procedure for
this message and perform the craftsperson activities listed:
MP SWITCH
The ECAC Communication test checks the communication between the
ECAC and active Processor. This is accomplished as a running test, divided
into two parts.
Communication is checked every second. This is done to confirm that the
ECAC can communicate with the active Processor. This is done indirectly.
The ECAC must initiate a request for Processor status every one-half (0.5)
second.
If a full second expires without a request being initiated, the Processor
dialogue has been compromised and the following error message is output to
the terminal; refer to the procedure for this message and perform the
Craftsperson activities listed:
EC-IC-ALM
The active processor must respond to a status request from the ECAC within
200 milliseconds, with a valid response. If there is no response from the
active processor, or if there is an invalid response, the ECAC lights the
MAJOR alarm lamp.
297-6201-502 Standard 01.02 September 2000