Ttrs Required For Primary Delay Announcement; Ttrs Required For Secondary Delay - Lucent Technologies MERLIN LEGEND Release 7.0 System Planning Manual

MERLIN LEGEND Communications System Release 7.0
System Planning 555-670-112
2 Control Unit Configuration
Numbering the System
Table 2-6
when using the Prompt-Based Overflow setting.
Table 2-6. TTRs Required for Primary Delay Announcement Devices
Number of Devices
1
2
3
4
5
6
7
8 or more
Table 2-7
when using the Prompt-Based Overflow setting.
Table 2-7. TTRs Required for Secondary Delay Announcement Devices
Number of Devices
1
2
3
4
5
6
7
8
9
10 or more
To calculate the total number of TTRs that are required by the system, do the
following:
1. If the system has a VMS, use
required by the system to support the VMS.
2. Estimate the hourly call volume for all calls originating from single-line
telephones, incoming calls (including private network tandem tie trunks) on
Remote Access and DID lines, all calls on tie lines, and calls routed to the
VMS. Use
estimated hourly call volume, and whether Account Codes are used.
shows the TTRs required for primary delay announcement devices
shows the TTRs required for secondary delay announcement devices
Table 2-5 to find the system requirements for TTRs based on the
Number of TTRs Required
1
2
3
4
4
5
5
6
Number of TTRs Required
1
1
1
2
2
2
3
3
3
4
Table 2-4 to find the number of TTRs
Issue 1
April 1999
2-21