Other Trunk Features
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DISA (Trunk-to-Trunk)
Direct Inward System Access (Trunk-to-Trunk) lets someone outside the system call in on a DISA Line and
place an outside call on a system line, bypassing the system operator. A security code is required to place an
outside call (Trunk-to-Trunk), and the Toll Restriction Class assigned to a security code determines the type
of calls that can be placed. The DISA caller must use a DTMF telephone.
1. Call the DISA line. The system answers with dial tone or
voice recorded message.
2. Dial #.
3. Dial DISA security code.
2. Dial Queuing Group number (1-6) for desired line or dial
9, then two-digit line number. Outside dial tone is heard.
- If busy tone is heard, follow either procedure below to
disconnect.
5. Dial telephone number (including PBX Trunk Access
Code if required).
6. Dial #. The call rings through.
1. Dial # and ∗. Hear dial tone.
2. Dial #.
3. Dial DISA security code.
4. Dial Queue Group number (1-6) for desired line or dial 9,
then two-digit line number. Outside dial tone is heard.
- If busy tone is heard, follow either procedure below to
disconnect.
5. Dial telephone number (including PBX Trunk Access
Code if required).
6. Dial #. The call rings through.
1. Dial #, #.
- You must dial #, # before hanging up the call to
disconnect both DISA line and a system line.
1. Dial 1.
- If you forget to dial 1, the call will be automatically
terminated within 10 seconds.
To use DISA to place a call
on a system line(Trunk-to-
Trunk):
To hang up the outside call
and reuse the DISA line:
To disconnect both the
DISA line and the system
line:
To continue the
conversation when cut-off
warning tone is heard:
(Outside Caller)
(Outside Caller)
(Outside Caller)
(Outside Caller)
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