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

Account Codes Used

No Account Codes Used

110

2

4

180

4

4

350

4

4

420

6

8

610

6

6

710

8

8

The following modules supply TTRs for the MERLIN LEGEND Communications System.

Table 3-5. Modules with TTRs

Module

No. of TTRs

 

008 OPT

2

 

012

2

 

400 GS/LS

4

 

400

4

 

800 DID

2

 

800 LS-ID

2

 

 

 

 

 

3–10Telephone Problems

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Image 378
AT&T 3.0 manual Modules with TTRs No. of TTRs