# Programming Embedded PRI/QSIG 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.

For more information, see Embedded PRI - Product Overview.

## Programming

To program embedded PRI or QSIG trunks:

1. Digital Link Descriptors form

2. Enter a number (1 through 16) to uniquely identify the Descriptor.

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

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

5. Select Network Termination (NT) or Line Termination LT)

6. For T1, set Extended Super Frame to Yes; set Inverted D-Channel to No.

7. For E1, set CRC-4 enabled to Yes.

8. For T1 in NA and E1 in Europe accept the default "Nil" for Voice Encoding. However, if you experience noise on the trunks, set Voice Encoding to "Invert".

9. E1 in NA or T1 in Europe must have Voice Encoding set to "ADI". T1 supports CSU mode and DSX-1 mode.

2. Digital Links form

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

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

- Enter a unique number (1-32) to identify the Trunk Circuit Descriptor Number that is used in the Digital Trunks form.

- Select "UNIVERSAL E1" or "UNIVERSAL T1" in the Card Type field.

- Select "Toll Office" or "Local Office" for PRI or "Local Office" for QSIG in the Far End Connection field.

4. Trunk Attributes form

- Enter a COS number.

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

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

5. Digital Trunks form

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

6. Network Synchronization form

- Assign a source connection to a Network Source Clock.

7. ISDN Protocol form

- Select the Protocol and Protocol Variant. For QSIG trunks, enable QSIG Prefix Insertion if required.

8. (Optional; applies to Euro-ISDN only) Advice of Charge form

- Select ETSI, Italy, Holland, Spain, or France.

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

10. (Optional) Bearer Capabilities form

- Define bearer capabilities on either Fixed or Call by Call basis. If you choose Fixed, you need to specify bearer capability for voice and data. Voice: Speech (default) or 3.1 kHz. Data: UDI (default), RDI, UDI (7 kHz)(E1 only), Video (E1 only).

11. PRI/QSIG Network Specific Facilities form ( ) or High Layer Compatibility form ( )

- You can define PRI/QSIG network specific facilities (applies to T1 only) and High Layer Compatibility (applies to Euro-ISDN only) on a Fixed or Call by Call basis.

12. (Optional) Calling Line ID Restriction form

- You can define Calling Line ID Restriction (CLIR) on a fixed or per-call basis.

13. Enable QSIG

    Digital Link Descriptors form

- Set the Integrated Digital Access option to ISDN Node.

- Set the QSIG Private Network Access option to Yes

- Shared System Options form

- Set the DPNSS/QSIG Diversion Enabled option to Yes

- If required, set the Maintain Original Forward or Reroute Reason to "Yes". With this option enabled, the system maintains and displays on the nominated party's telephone or console the original reason for forwarding or rerouting a call.

- Trunk Circuit Descriptor - MSDN-DPNSS-DASSII form

- Set the Far End Connection option to Local Office

14. Set up Calling Party Number Substitution (optional; for PRI and BRI trunks only):

15. For DID-based substitution, complete the DID Ranges for CPN Substitution ( ) and CPN Substitution forms ( ).

16. For DN-based substitution, complete the Associated Directory Numbers form.

15. (Optional) ISDN Outgoing Numbers form (Euro ISDN Standard trunk variants only)

- This form allows you to select the outgoing numbering plans for Euro ISDN Standard trunk variants. To meet the specific ISDN requirements of a European region, you can select the Calling Number and Called Number parameters.

16. Set up number manipulation on the called and/or calling party number (optional; for Euro ISDN Standard trunk variants only):

    Inward Dialing Modification form

- Configure rule(s) for altering the dial strings in the inbound calls.

ISDN Called Party Inward Dialing Modification form

- Choose the rules to apply to the called number (the number the caller is attempting to reach).

ISDN Calling Party Inward Dialing Modification form

- Choose the rules to apply to the calling number (the call originator).

NOTE: Inward Dialing Modification is applied AFTER Inward Dialing Prefixes are added to the incoming dial string. To avoid confusion, use one of these methods of modification only to alter the dial string.

Related Topics

- QSIG Prefix Modification