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MERLIN LEGENDCommunications System Release 6.1
System Planning
555-661-112
Issue 1
August 1998
Lines/Trunks
Page 3-39Selecting Line/Trunk Options
3
Tie Trunks 3
Use these instructions only if the system has tie trunks, including tie trunks
emulated through a DS1 connection. Otherwise, skip to the next section, “DID
Trunks (Hybrid/PBX Mode Only).”
If configuring T1-Tie trunks, including those with Switched 56 digital data service,
complete the instructions in the “T1 Service” section first.
Tie trunks must be configured to match central office requirements or the
configuration of the system to which they tie. Review tie trunk operations and
make the following decisions about the way each tie trunk operates:
■ Direction
■ Signaling type
■ E & M Signaling
■ Dial mode
■ Dial tone
■ Answer supervision time
■ Disconnect time
■ Private network tandem trunks
NOTE:
See the
Network Reference
for information on private networking.
This section contains instructions for each of these options.
Planning Form Instructions 3
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. Use this option for private networks.
■ 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: