Lucent Technologies 6.1 Compensating for Slow Dial Tone International, 110 180 350 420 610 710

MERLIN LEGENDCommunications System Release 6.1	Issue 1
System Planning 555-661-112	August 1998
3 Lines/Trunks
Selecting Line/Trunk Options	Page 3-49

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
110	4	4	6	6	8	8
180	6	6	8	10	10	10
350	8	10	10	10	14	14
420	8	10	12	14	14	16
610	10	12	14	16	18	20
710	10	14	16	18	20	22