AT&T MERLIN LEGEND Communications System PBX System Planning Manual page 92

Trunks
Signaling Type
See "Dial Mode" in this section.
See 'DS1 Facility" earlier in this chapter,
and Trunk Assignment* later in this
chapter.
E&M Signal
The choices for signaling type (also called seizure type) are wink, delay,
immediate, and automatic. Of the four types, wink, delay, and immediate are
similar in that they allow users to call people in the other system by dialing their
extensions. With the automatic type, no dialing is needed: users call an operator
who then transfers the call to the proper person.
Choose the same type as that used by the system to which you are connecting.
For incoming-only or two-way tie trunks, the incoming type must be the same as
the outgoing type of the remote system. For outgoing-only or two-way tie trunks,
the outgoing type must be the same as the incoming type of the remote system.
Wink is the factory setting, and if available, it is the preferred type, followed by
delay and then immediate.
Note: Immediate does not work with the touch-tone dial mode.
For T1 facilities used for services (for example, Megacom), consider the
direction of the tie trunk and how trunk assignments will be made and select
from the following:
One-way, outgoing tie trunks. All outgoing calls are placed using
Automatic Route Selection and tie trunks are not assigned to Personal Line or
Pool buttons on telephones. Select wink signaling.
One-way, outgoing tie trunks. Tie trunks are assigned to Personal Line or
Pool buttons on telephones. Select immediate signaling.
One-way, incoming tie trunks. Dialed Number Identification Service (DNIS)
is included. Select wink signaling.
One-way, incoming tie trunks. DNIS is not included. Select automatic
signaling.
Planning Form Instructions
Under the "Signaling Type" heading on Form 3d, check eith "In" or "Out"
under "Wink," "Delay," "Immediate," or "Automatic" for each tie trunk.
Select one of the following signaling types to be used on the tie trunks:
Select type 1 S (the factory setting) if the tie trunks are connected to the other
system through the local telephone company.
Select type 1 C if the tie trunks are connected directly to a system that uses
type IS signaling and is located near this system.
Select type 5 if the tie trunks are connected directly to a system that uses
type 5 signaling and is located near this system.
Planning Form Instructions
Under the "E&M Signal" heading on Form 3d, check your choice of signal
type for each tie trunk.
Trunk Options 3-37