MERLIN LEGEND Communications System Release 6.1 | Issue 1 |
Network Reference 555-661-150 | August 1998 |
| |
DTouch-Tone Receiver Requirements
System Requirements for Touch-Tone Receivers | | Page D-2 |
| | Table D–1. TTRs Required by VMS/AA | | | |
| | | | | |
| | Number of VMS Ports | Number of TTRs Required |
| | | | | |
1 | | 1 | | |
| | | | | |
2 | | 1 | | |
| | | | | |
3 | | 2 | | |
| | | | | |
4 | | 2 | | |
| | | | | |
6 | | 3 | | |
| | | | | |
8 | | 4 | | |
| | | | | |
12* | | 6* | | |
| | | | | |
18 | | 8 | | |
*If a 12-port MERLIN LEGEND Enhanced Service Center is used, 8 TTRs are required.
Table D–2 estimates the total number of TTRs required in the system, based on call volume and whether the system uses account codes. The call volume per hour in this table includes all calls originating from single-line telephones, calls on tie lines, incoming remote access and DID calls.
NOTE:
You must consider the call traffic across a private network when estimating the number of required TTRs. This includes calls on analog tandem tie trunks and T1-emulated tandem tie trunks. In addition, if your private network includes Centralized Voice Messaging, you must consider the call traffic coming across the private network for the voice messaging system and the TTRs required for the updating of Message Waiting lights (Release
6.1or later systems). For this updating, a TTR is required at the sending end and the receiving end. If the systems in the private network are connected by PRI trunks, no additional TTRs are needed.
