Nortel 1000 Features And Services Fundamentals page 229

Prompt Response
...
DCTI (0)-511
Feature operation
Feature operation for Call Park on Unsupervised Trunks is the same as
that for Call Park.
Copyright © 1994–2008, Nortel Networks
.
Description
Time, in seconds, that an extension is allowed to ring or be on
hold or Call Park before the trunk is disconnected. 0, the default,
or <CR> means that the condition goes on indefinitely.
Respond with a value equal to the number of seconds a set is
to ring after recall, plus the value of the Call Park Recall Timer
(which is defined in LD 50 in response to the CPTM prompt).
The value stored, which is the closest lower multiple of four, is
echoed back upon entry.
Nortel Communication Server 1000
Features and Services Fundamentals — Book 2 of 6 (C)
NN43001-106 02.04 Standard
Release 5.5 9 May 2008
Feature operation 229