IBM 84H5162, Руководство по установке

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PCMCIA 33.6 Data/FAX/Voice Modem
4-3
To ensure that your transmission quality is as high as possible, do the
following:
•
Use cellular protocols whenever possible. These will be set up automatically
on the modem when you plug in the Megahertz cellular direct connect cable.
Always use error correction and data compression to receive and send the
highest quality transmissions.
•
Use cellular modem pools if available. Contact your cellular carrier or
service provider to see if cellular modem pools are available in your area.
This service is accessed by dialing the previs *DATA (*3282) before the
number you are dialing.
•
Be sure the signal is as strong as it can be. Refer to your cellular phone’s
manual for a description of signal strength, and an explanation of how to
read the signal strength bars. If the signal is not strong enough to support a
voice call, it will not handle data transmission.
•
Pull the antenna out to its full length and point it in several
different directions until you find the strongest signal. Try putting
the phone in a vertical position and moving it closer to a window.
Never lay the phone on a metal surface during transmissions.
•
Keep in mind that large objects like mountains or even a car hood
can cause the signal to be reflected back to you or block the signal
from reaching the phone.
•
Be sure the cellular phone’s battery is fully charged while you are sending
or receiving faxes or data.
•
If the low battery message blinks during transmission (signaling it
is running out of power), disconnect the transmission, attach a fully
charged battery, and redial.
Automatic Cable Sensor
When no cellular cable is inserted, the modem is in landline mode. When a
cellular cable is inserted, a three-tone ascending beep will sound, the message
Motorola Cable Attached or Nokia Cable Attached will appear (if you are in
terminal mode), and the modem will automatically go into cellular mode.
If a cable is attached that the modem does not recognize, the message
Unrecognized Cable Attached will appear if you are in terminal mode.
No AT command string is needed to put the modem into cellular mode. The
initialization string is automatically sent when the cable is attached.
When the cellular cable is removed, the message Cable has been Removed will
appear if you are in terminal mode and the modem will automatically return to
land line mode.