54 Hayes Modem Installation Guide
New Zealand
External Modems & Internal Modem Cards
The grant of a Telepermit for a device in no way indicates Telecom acceptance of responsibility for
the correct operation of that device under all operating conditions. This equipment shall not be
used in any manner which could constitute a nuisance to other Telecom customers.
Some parameters required for compliance with Telecom’s PTC specifications are dependent upon
the equipment within which this modem is installed. The equipment shall be set to operate within
the following limits for compliance with Telecom specifications.
When the user manually initiates a call via equipment to which the modem card is installed, the
equipment shall operates as follows:
Not more than five call attempts shall be made to the same number within a one hour period.
There shall be at least 60 seconds between call attempts.
Not more than a total of ten call attempts shall be made to the same number for any single manual
call initiation.
Automatic calls to different numbers shall not be less than five seconds apart.
The user must immediately disconnect this modem should it become physically damaged and
arrange for either its disposal or repair.
Only Telepermitted equipment may be connected to the telephone port.
The correct setting for use with this modem in New Zealand are:
ATB0 (CCITT operation)
AT&G2 (1800Hz guard tone)
AT&P1 (Pulse dialling make/break ratio of 33:67)
ATS0=0 (Auto-answer is disabled)
ATS11=65 (DTMF on/off duration = 65ms)
ATX2 (Dialtone detect but not USA call progress detect)
When used in auto-answer mode, the S0 register must be set to a value between 2 and 5. This
ensures that a calling party to your modem will hear at least one burst of ringing before the modem
answers, This
1. Confirms that the call has been correctly switched through the network.
2. Allows time for Caller Display information to be transmitted.
This device is NOT intended for connection in parallel with any other devices. The operation of
this equipment on the same line as telephones or equipment with audible warning devices or
automatic ring detectors may give rise to bell tinkle or other noises which may cause false tripping
of the modems ring detection circuit. The use should NOT report such occurrences as faults.
WARNING: New Zealand “Reverse dialling” standard is NOT implemented on this modem. The
preferred method of dialling is to use DTMF tones - call initiation is faster and more reliable than
pulse dialling. If for some reason you must use pulse dialling, your communications program must
be set up to record numbers using the following translation table:
Number to be dialled: 0 1 2 3 4 5 6 7 8 9
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