Section 700 - Operation Chapter 3. System Features
576-13-700 DBS 576 (USA), Revised 6/11/98 29
When connected behind a PBX or Centrex, Toll Restriction Service (TRS) can be used to restrict
calls.
The System also supports transmission of a flash signal over the centrex or PBX link.
Hardware Requirements
•N/A
Related Programming
•N/A
Considerations
•N/A
Class of Service Description
A Class of Service (COS) allows or restricts access to a group of features or functions. For instance,
an Extension COS may allow Call Forwarding features. In the System, both extensions and tr unks us e
classes of service.
The System supports the following COSs for trunks and extensions:
• COS - Trunk/Tie
• COS - Ext/Ext Restriction
• COS - Extension Feature
• COS - Trunk to Trunk Restriction
Class of Service - Trunk/Tie
Tie/Trunk COS allows or restricts access to various features. Each trunk is assi gned to one of 16 trunk
classes of service (00-15).
The following table shows the features that can be enabled/disabled for each trunk COS.
Table 4. Trunk COS
Hardware Requirements
•N/A
Number Feature
1 Intercom Ringing Tone (CO or intercom ring tone)
2 Dial Tone to Tie Lines (Enable/Disable)
3 Forced Recover on Fast-Busy Tone (Send fast busy or disconnect line)
4 DID/DDI Dialed Number Conversion Table (DID/DNIS Table A or B)
5 Paging on DISA/Tie-Line Call (Allow/Restrict)
6 DISA ID Verification