System Requirement For Ttrs - AT&T MERLIN LEGEND Release 3.1 Maintenance And Troubleshooting Manual

System Requirements
for Touch-Tone Receivers
Table 3–4 estimates the total number of TTRs required in the system, based on call
volume and whether the system uses account codes. The call volume in this table
includes all calls originating from single-line telephones, calls on tie lines, incoming
remote access and Direct Inward Dial (DID) calls, and calls routed to the voice
messaging system.
Table 3–4. System Requirement for TTRs
Calls/Hour
110
180
350
420
610
710
The following modules supply TTRs for the MERLIN LEGEND Communications System.
Table 3–5. Modules with TTRs
Module
008 OPT
012
016
400 GS/LS
400
800 DID
800 LS-ID
3–10
Telephone Problems
Account Codes Used
2
4
4
6
6
8
No. of TTRs
2
2
4
4
4
2
2
No Account Codes Used
4
4
4
8
6
8