Comtrol RM II V.90 - Manual (Page 4)

Using the Speaker
The RocketModemII includes a speaker, which enables
you to listen to the call in progress and helps you
determine the state of the phone line and the modem.
This speaker is shared by all modems on the board and
can be controlled for individual modems by use of AT
commands.
The following table lists some of the more commonly
used speaker-related AT commands. For a complete list,
see the AT Commands reference.
Modem Cables
RocketModemII ports use standard telephone-type
unshielded twisted-pair cables with RJ11 modular
connectors. These can be purchased anywhere
commercial telephone products are sold.
If you choose to build your own cables, use the following
information. When building cables, use Category 3 (or
better) unshielded twisted-pair wiring.
The connector pinouts are as shown below:
FCC Notices
Radio Frequency Interference (RFI) (FCC 15.105)
This card has been tested and found to comply with the
limits for Class B digital devices pursuant to Part 15 of
the Federal Communications Commission rules.
The RocketModemII generates, uses, and can radiate
radio frequency energy, and if not installed and used in
accordance with this card, may cause harmful
interference to radio communications. However, there is
no guarantee that interference will not occur in a
particular installation. If this equipment does cause
harmful interference to radio or television reception,
which can be determined by turning the equipment off
and on, you are encouraged to try and correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the distance between the equipment and
the receiver.
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV
technician for help.
Labeling Requirements (FCC 15.19)
The RocketModemII complies with part 15 of FCC rules.
Operation is subject to the following two conditions:
•
This device may not cause harmful interference, and
• This device must accept any interference received,
including interference that may cause undesired
operation.
Modifications (FCC 15.21)
Changes or modifications to this equipment not
expressly approved by Comtrol Corporation may void
the user's authority to operate this equipment.
Cables (FCC 15.27)
This equipment is certified for Class B operation when
used with unshielded cables.
FCC Part 68 Notice
1.
This equipment complies with Part 68 of FCC rules.
On the bottom panel of the unit is a label containing
the FCC registration number, ringer equivalence
number, and the USOC jack code.
2. The RocketModemII uses FCC compliant modular
plugs, it is designed to be connected to the telephone
network or premises wiring using a compatible
modular jack which is FCC Part 68 compliant.
3. If this equipment causes harm to the telephone
network, the telephone company will notify you in
advance that temporary discontinuance of service
may be required. But, if advance notice is not
practical, the telephone company will notify you as
soon as possible. Also you will be advised of your
right to file a complaint with the FCC, if you believe
it is necessary.
4. The telephone company may make changes in its
facilities, equipment, operations, or procedures that
could affect the operation of the equipment. If this
happens, the telephone company will provide
advance notice in order for you to make necessary
modifications in order to maintain uninterrupted
service.
AT Command Usage
L
ATL(0, 1, 2, 3). Enter the ATLn com-
mand to set the modem speaker
volume, where 0 is the lowest level
and 3 is the highest level.
This value is written to S22 bits 0
and 1.
M
ATM(0, 1, 2, 3). Enter the ATMn
command to set the modem
speaker mode. This value is writ-
ten to S22 bits 2 and 3. Valid val-
ues are:
• M0 - Speaker always off
• M1 - Speaker on when making
call but off when receiving
carrier
• M2 - Speaker always on
M3 - Speaker off when making call
but on when answering
&V
Enter AT&V to display the contents
of the S-Registers and check the
state of the L and M registers.
RJ11 Pins Signals
1 and 4 Not used
2 Ring
3 Tip
Pin 1 Pin 4