IBM ThinkPad T23 2647 Supplementary Manual page 73

Some parameters required for compliance with Telecom's PTC Specifications
are dependent on the equipment (PC) associated with this modem. The
associated equipment shall be set up to operate within the following limits for
compliance with Telecom specifications:
There shall be no more than 10 call attempts to the same number within
any 30 minute period for a single manual call initiation
The equipment shall go back on-hook for a period of not less than 30
seconds between the end of one call attempt and the beginning of the next.
Automatic calls to different numbers shall be not less than 5 seconds apart.
When used in the Auto-Answer mode, the S0 register must be set with a
value between 2 and 5. This ensures:
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.
Caller identification information (which occurs between the first and
second ring cadence) is not destroyed.
This equipment does not meet Telecom's impedance requirements.
Performance limitations may occur when used in conjunction with some parts
of the network. Telecom will accept no responsibility should difficulties arise
in such circumstances.
The code for Call Waiting disable is *52 on the Telecom New Zealand
telephone network.
For the modem with approval number PTC 211/99/020
v The grant of a Telepermit for any item of terminal equipment indicates only
that Telecom has accepted that the item complies with minimum conditions
for connection to its network. It indicates no endorsement of the product by
Telecom, nor does it provide any sort of warranty. Above all, it provides no
assurance that any item will work correctly in all respects with another item
of Telepermitted equipment of a different make or model, nor does it imply
that any product is compatible with all of Telecom's network services.
v This equipment is not capable, under all operating conditions, of correct
operation at the higher speeds for which it is designed. Telecom will accept
no responsibility if difficulties arise in such circumstances.
v This device is equipped with pulse dialling, whereas the Telecom standard
is DTMF tone dialing. There is no guarantee that Telecom lines will always
continue to support pulse dialling.
v Use of pulse dialling, when this equipment is connected to the same line as
other equipment, may give rise to bell tinkle or noise and may also cause a
false answer condition. If such problems occur, the user should NOT
contact the Telecom Faults Service.
Appendix B. Product warranties and notices
65