# Programming MSDN/DPNSS Trunks

## Before You Begin

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

## Programming

To program MSDN/DPNSS trunks:

1. Digital Link Descriptors form

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

- Enter "DPNSS" in the Integrated Digital Access field.

2. Digital Links form

- Enter the Digital Link Descriptor Number programmed in step 1.

3. Class of Service Options form

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

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

- Enable "Incoming" or "Outgoing" from the Dual Seizure Priority field.

- Select "MAIN PBX" from the Far End Connection field.

- Enable "MSDN-DPNSS" from the Signaling Protocol field.

5. Trunk Attributes form

- Enter the COS number programmed in step 3.

- Complete the Non-dial in Trunks Answer Point fields.

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

6. Digital Trunks form

- Complete the Trunk Number, Trunk Service Number (from step 5), Circuit Descriptor (from step 4), and Interconnect Number fields.

7. Network Synchronization form (optional)

- Assign a source connection to a Network Source Clock.