AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual page 139

Lines and Trunks
Signaling Types (also called seizure type)
—
— Immediate—No start signal is necessary, and dialing can begin
— Delay—The originating end of the tie trunk transmits an off-hook
— Automatic—incoming calls are routed directly to another station
Wink, immediate, and delay types are also called dial-repeating tie
trunks.
If you are installing a 400EM module in the control unit, you need Form 3c,
Incoming Trunks—Tie to determine the switch settings prior to installing the
module in the control unit. For each 400EM module trunk jack, check the form,
If the E&M Signal column indicates 1C or 5 for a particular logical ID, set the
DIP switches on the front of the 400EM module, as shown in Figure 3-1 and
Table 3-1.
Wink (factory setting)—The originating end of the tie trunk
transmits an off-hook signal and waits for the remote end to send
back a signal (a wink) indicating that it is ready to receive dialing
information.
immediately after the tie trunk is seized.
signal and waits for the remote end to send an off-hook signal
followed by an on-hook signal.
without a start signal. When the user picks up the handset, the
signal rings immediately at the other end. This is also called an
automatic ringdown tie trunk.
Tie Trunks 3-5