Comtrol RocketPort USB Modem Hub - Manual (Page 2)

Using the Speaker 2 of 4
Using the Speaker
The RocketPort USB Modem Hub includes a speaker
that enables you to listen to the call in progress and
helps you determine the state of the phone line and
the modem. You can control each modem by using
the AT commands. All the modems in this hub share
one speaker.
The following table lists some of the more commonly
used speaker-related AT commands. For a complete
list, see the AT Commands set.
Using the Downstream Ports
The modem hub includes two USB type A
downstream ports, so you can connect multiple
peripherals (including additional modem hubs) while
at the same time supporting your modem hub.
If you want to add more RocketPort USB Modem
hubs to this one, you can daisy-chain up to three
modem hubs. Each modem hub requires its own
power supply.
Building Cables
The modem ports use standard telephone-type
unshielded twisted-pair cables with RJ11 modular
connectors. You can purchase these anywhere
commercial telephone products are sold.
Use the following table for pinout information for the
RJ11 port connectors on the RocketPort USB Modem
Hub.
When building cables, use Category 3 (or better)
unshielded twisted-pair wiring.
The following table describes the connector pinouts.
Safety Notice
Installation of inside wire may bring you close to
electrical wire, conduit, terminals and other
electrical facilities. Use extreme caution to avoid
electrical shock from such facilities. Avoid contact
with electrical current by following these guidelines:
• Use tools with insulated handles.
• Do not place telephone wiring or connections in
any conduit, outlet, or junction box containing
electrical wiring.
Note: Do not work on your telephone wiring at all if
you wear a pacemaker. Telephone lines carry
electrical current.
• Telephone wiring must be at least 6 feet from
bare power wiring or lightning rods, and
associated wires, and at least 6 inches from other
wire (antenna wires, doorbell wires, wires from
transformers to neon signs), steam or hot water
pipes, and heating ducts.
• Before working with existing inside wiring, check
all electrical outlets for a square telephone dial
light transformer and unplug it from the
electrical outlet. Failure to unplug all telephone
transformers can cause electrical shock.
• Do not place a jack where it would allow a person
to use the telephone while in a bathtub, shower,
swimming pool, or similar hazardous location.
• Do not connect to, remove, or modify protectors
and grounding wire placed by the service
provider.
CAUTION: Do not touch telephone wiring during
lightning!
Operating Conditions
The following tables illustrate RocketPort USB
Serial Hub conditions and specifications.
AT Command Usage
M
ATM(0, 1, 2, 3). Enter the ATMn
command to set the modem speaker
mode. This value is written to S22
bits 2 and 3. Valid values 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
Environmental
Condition
Value
Air temperature:
System on
System off 0 to 40 o C
-20 to 85 o C
Humidity (non-condensing):
System on
System off 8% to 80%
20% to 80%
Altitude 0 to 10,000 feet
Electromagnetic Compliance Status
Emission:
Canadian EMC requirements
CISPR-22/EN55022 Class A
FCC PART 15, Subpart J: Class A
Yes
Immunity:
EN50082 (801-2 ESD, 801-3 RF and
801-4 FT) Yes
European TBR21/CTR21 Compliant Yes
JATE Compliant Yes