Filter
Top Products
MERLIN LEGENDCommunications System Release 6.1
System Planning
555-661-112
Issue 1
August 1998
Lines/Trunks
Page 3-49Selecting Line/Trunk Options
3
Compensating for Slow Dial Tone (International) 3
If this system is being installed
outside of the US
, problems can arise because of
slow dial tone from local telephone companies due to the limitations of their
switching equipment. If this is the case, be aware of the following:
■ Users should be instructed to wait for dial tone before they dial. (Due to
changes made to internal timers, the system will allow the delay.)
■ The following features cannot be used:
— Automatic Route Selection
— Remote Call Forwarding
— Remote Access (outgoing)
— Tie trunks (configuration-dependent)
— Delay option on rotary lines
— Autodial, Last Number Dial, Saved Number Dial, and Callback
queue
Also, the slow dial tone may cause problems with transferring a call, joining
a call, and end-to-end signaling.
■ Additional touch-tone receiver (TTR) boards may be needed for the
system. The number of TTRs can be increased by adding 400 GS/LS or
016 T/R modules, each of which provides four TTRs or by adding 008 OPT,
012 T/R, 800 GS/LS-ID, or 800 DID modules, each of which provides two
TTRs.
To determine the number of TTRs needed, perform a traffic study on the number
of outgoing single-line telephone calls/busy hour, and the number of incoming
calls/busy hour routed to applications such as MERLIN LEGEND Mail. Then use
Table 3–6
to determine the number of TTRs required.
Table 3–6. Total Number of TTRs Required
Calls per Hour Dial-Tone Delay
0 sec 15 sec 30 sec 45 sec 60 sec 75 sec
110446688
180668101010
350 8 10 10 10 14 14
420 8 10 12 14 14 16
610101214161820
710101416182022