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MERLIN LEGENDCommunications System Release 6.1
System Planning
555-661-112
Issue 1
August 1998
Lines/Trunks
Page 3-42Selecting Line/Trunk Options
3
DID Trunks (Hybrid/PBX Mode Only) 3
Use these instructions only if Direct Inward Dial (DID) trunks are connected to the
system. Otherwise, skip to the next section, “NI-1 BRI Connectivity.”
!
SecurityAlert:
DID numbers that correspond to the remote access code can be used to
make calls on the system’s trunks, leading to toll abuse and/or fraud. (See
Appendix A, “Customer Support Information,” for more information about
security.)
This section contains instructions for setting the following options for DID trunks:
■ Type of DID Trunks
■ Expected Digits
■ Delete Digits
■ Add Digits
■ Signaling
■ Invalid Destination
■ Trunks Included in Blocks
These options are assigned to blocks of trunks. A maximum of two blocks is
permitted.
If you want to allow remote access on DID trunks, one of the telephone numbers
assigned by the telephone company must match the remote access dial code.
The factory setting is 889.
If two-way DID service is available from the local telephone company, it is typically
set up as Tie trunk service.
NOTES:
1. If the system will have two blocks, make a copy of Form 3d and write the
block number in the Block Number space. Check with the local telephone
company to determine the number of digits sent.
2. DID trunks cannot be assigned to ring into a calling group.
!
CAUTION:
!
CAUTION:
Since the system can have only two blocks of DID trunks, when configuring
a private network, careful planning of both immediate and future needs is
essential when ordering DID trunks from the local telephone company. See
the Network Reference for additional information.