Lucent Technologies MERLIN LEGEND Release 5.0 Maintenance And Troubleshooting Manual page 87

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting 555-650-140
Telephone Problems
System Requirements for Touch-Tone Receivers
Estimate the hourly call volume for calls originating from single-line

telephones, incoming calls on remote access and Direct Inward Dial
(DID) lines, and calls on tie lines.
Use Table 3-4 to determine the number of TTRs required by the

system.
Add the number of TTRs obtained in Steps 1 and 3.

Use Table 3-5 to determine the number of TTRs already supplied.

Compare the numbers obtained in Steps 4 and 5 to see if additional

TTRs need to be added.
Add a new module if indicated.

See Installation .
A voice messaging system requires a certain number of TTRs, in addition to any
system requirements for TTRs. The number of TTRs required by the voice
messaging system depends on the number of ports used by the voice
messaging system.
Use Column 2 if account codes are not being used.
Use Column 3 if account codes are being used.
Issue 1
June 1997
Page 3-9