# Programming Embedded T1/D4 Trunks

## Before You Begin

Ensure that:

- The T1/E1 Combo Card, or Dual T1/E1 Framer Module is installed and programmed.

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

## Programming

To program T1/D4 trunks:

1. Digital Link Descriptors form

- Select "T1D4" from the Integrated Digital Access field.
  T1 supports CSU mode and DSX-1 mode.

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" (if provided).

4. Complete one of the following forms:

5. Trunk Circuit Descriptor - Digital CO

6. Trunk Circuit Descriptor - Digital DID

7. Trunk Circuit Descriptor - Digital E and M

5. Trunk Attributes form

- For E&M trunks, set Release Link Trunk to "E&M"

- For Non-dial in Trunks (CO and E&M), set Day, Night1, and Night2 Answer Points

- For Dial in Trunks (DID), set the number of digits to absorb in the Incoming Digit Modification-Absorb field

6. Digital Trunks form

- Enter a Trunk Number, Trunk Service Number (from step 5), Circuit Descriptor (from step 4), and Interconnect Number.

7. Network Synchronization form (optional)

- Assign a source connection to a Network Source Clock.

8. Trunk Groups form

- For outgoing trunks, assign the trunk number (from step 6) to a trunk group.