# Programming PRI/QSIG Trunks

## Before You Begin

- Ensure that Interconnect Restriction and Intercept Handling is programmed for each trunk.

## Programming

To program PRI or QSIG trunks:

1. Digital Link Descriptors form

- Enter "A" or "B" in the Address for Message Control field.

- Enter "ISDN NODE" in the Integrated Digital Access field.

- T1 supports CSU mode and DSX-1 mode.

2. Digital Links form

- Complete the Number field.

3. Class of Service Options form

- Set the ANI/DNIS ISDN Number Delivery Trunk field to "Yes".

4. Trunk Circuit Descriptor - MSDN-DPNSS-DASS II form

- Enter "MSDN-DPNSS" in the Signaling Protocol field, "UNIVERSAL E1" or "UNIVERSAL T1" in the Card Type field, and "Toll Office" or "Local Office" for PRI or"Local Office" for QSIG in the Far End Connection field.

5. Trunk Attributes form

- Enter the COS number and Non-dial in trunks Answer Point.

- Complete the Dial in Trunks: Incoming Digit Modification fields.

6. Digital Trunks form

- Enter a Trunk Number, Trunk Service Number, Circuit Descriptor, and the Interconnect Number.

7. ISDN Protocol form

- For QSIG trunks, enable QSIG Prefix Insertion if required.

8. (Optional; applies to Euro-ISDN and QSIG trunks only) Inward Dialing Prefixes form

9. (Optional) Network Synchronization form

- Assign a source connection to a Network Source Clock.

Related Topics

- QSIG Prefix Modification