Nortel Meridian 1 Option 11C Planning And Installation Manual page 306

Page 306 of 408 Connecting the trunks
553-3021-210 Standard 7.00
After a delay of approximately 4 seconds you hear special dial tone
and the sequence is repeated when the following prompt appears on
the character display.
"TN?"
8 Hang up or repeat the sequence.
The sequence ends when the last unit in the card is used and the
program is complete, or when you hang up the telephone receiver.
Note: The model used for the first trunk activated in the sequence will
be the default for all subsequent trunks until the telephone is hung up
unless you manually enter a new trunk model number.
January 2002