Technical information

Programming
131
Programming a DISA Trunk
1. Form 01, System Configuration
 Program a trunk card that meets the trunk type requirements.
2. Form 13, Trunk Circuit Descriptors
 Select a DISA circuit descriptor to match hardware type.
3. Form 03, Class of Service
 Assign trunk options only.
4. Form 15, Dial-In Trunks
 Assign COS, COR, and Tenant.
 Column N: set to 0
 Column M: set to 0
 Column X: leave blank
 Assign a Trunk Name if desired. This name appears on the
consoles and on the set displays for incoming and outgoing calls.
Recommended Options for system security include:
Form 03: Enable Option 808 (Special DISA).
Form 04: Enable Option 5 (Verified Account Codes) and specify a
time for Option 54 (DISA Answer Timer).
Form 33: Enter appropriate DISA access codes.
Assignment of a DISA circuit descriptor to a trunk changes the
trunk to a DISA trunk.
Assign a separate COS for the Dial-In Trunk.
If the DISA trunk is a loop-start CO trunk, then loop- start
interconnection rules apply and the restrictions on-loop start
CO trunks applies.
Four-circuit/Eight-circuit LS/CLASS trunks can also be
programmed as DISA trunks.