❑Some parameters required for compliance with Telecom’s PTC Specifica- tions are dependent on the equipment (PC) associated with this modem. The associated equipment shall be set to operate within the following limits for compliance with Telecom Specifications:
a/ | There shall be no more than 10 call attempts to the same number within |
| any 30 minute period for any single manual call initiation, and |
b/ | The equipment shall go |
| between the end of one attempt and the beginning of the next. |
c/ | Automatic calls to different numbers shall be not less than 5 seconds |
| apart. |
❑Immediately disconnect this equipment should it become physically dam- aged, and arrange for its disposal or repair.
❑The correct settings for use with this modem in New Zealand are as follows: ATB0 (CCITT operation)
AT&G2 (1800 Hz guard tone)
AT&P1 (Decadic dialing
ATS10=less than 150 (loss of carrier to hangup delay, factory default of 15 recommended)
ATS11=90 (DTMF dialing on/off duration=90 ms)
ATX2 (Dial tone detect, but not (U.S.A.) call progress detect)
❑When used in the Auto Answer mode, the S0 register must be set with a value of 3 or 4. This ensures:
(a)a person calling your modem will hear a short burst of ringing before the modem answers. This confirms that the call has been successfully switched through the network.
(b)caller identification information (which occurs between the first and second ring cadences) is not destroyed.
❑The preferred method of dialing is to use DTMF tones (ATDT...) as this is faster and more reliable than pulse (decadic) dialing. If for some reason you must use decadic dialing, your communications program must be set up to record numbers using the following translation table as this modem does not implement the New Zealand “Reverse Dialing” standard.
Number to be dialed: 0 1 2 3 4 5 6 7 8 9
Number to program into computer: 0 9 8 7 6 5 4 3 2 1
Note that where DTMF dialing is used, the numbers should be entered nor- mally.
