Nortel DMS 100 Series Maintenance Manual page 59

messages that clarify any activity. The following table explains common
phrases found in these messages.
Table 2-17 Message phrases that describe CC to RSC-M SWACT
communication
Message phrase
Original active unit
Original inactive unit
Newly active unit
Newly inactive unit
Gain message
Gain acknowledge
message
Gain acknowledge
received
Drop message
The figure on the next page shows the sequence for a controlled and
uncontrolled SWACT and the SWACT-back operation of feature AN0538.
The following section provides information about this feature.
DMS-100 Family Remote Switching Center Multi-Access Maintenance Manual XPM11 and up
Explanation
Active unit before the SWACT (unit 0)
Inactive unit before the SWACT (unit 1)
Active unit after the SWACT (unit 1)
Inactive unit after the SWACT (unit 0)
The message that the newly active unit (unit 1) sends to
the CC. This message informs the CC that the unit
gained activity.
The message the CC sends to the original active unit to
confirm the newly active unit sends messages
The message the originally active unit sends to CC to
confirm the newly active unit passed the post-SWACT
audit
The message the originally active unit (unit 0) sends to
the CC. This message informs the CC that the unit
dropped activity.
Maintenance overview 2-43