AT&T MERLIN LEGEND Release 3.1 System Planning Manual page 108

Selecting Line/Trunk Options
Dial tone
Answer supervision time
Disconnect time
This section contains instructions for each of these options. For detailed
information about DID trunks, see the Equipment and Operations Reference.
Planning Form Instructions
1. Transfer the trunk identification from Form 2c, System Numbering:
Line/Trunk Jacks, to Form 3c, Incoming Trunks: Tie. Write the logical ID
and trunk number for each tie trunk connected to the system.
2. Under the Direction heading on Form 3c, check the direction for each tie
trunk next to its trunk number:
If the tie trunk is two-way, check the Two Way (factory-setting)
column.
If the trunk is one-way, check either the Outgoing column or the
Incoming column.
3. Under the Signaling Type (Intype/Outtype) heading, check the
appropriate column for either In or Out under the Wink, Delay, Immediate,
or Automatic columns for each tie trunk. For T1 facilities used for services
(for example, Megacom), consider the direction of the tie trunk and how
trunk assignments will be made. Then select from the following:
NOTES:
1. Check the same signaling type 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.
2. Wink is the factory setting and is the preferred type, followed by Delay
then Immediate. Immediate does not work with touch-tone dial mode.
3. Immediate Dial incoming signaling is required if the CO switch is an
AT&T 5ESS or Northern Telecom DMS-100 and incoming calls are
administered to route by Line Appearance. Immediate Dial outgoing
signaling should not be used for digital emulated Tie trunks using T1
Switched 56 service due to the lack of trunk integrity checking.
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.
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Lines/Trunks