Z0221500ZCO Zilog, Z0221500ZCO Datasheet - Page 32

• Manufacturer Part Number: Z0221500ZCO
• Description: Z02215 ONE-CHIP MODEM EVAL KIT
• Manufacturer: Zilog

Specifications of Z0221500ZCO

• Main Purpose: Telecom, Modem
• Utilized Ic / Part: Z02215
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

TROUBLESHOOTING SUMMARY
Setup and Installation
Problem
Terminal program
software does not
recognize the
modem evaluation
board, and there is
some initialization
problem
Modem initializes
and accepts AT
commands, but does
not dial
Does not go off-hook
to make a call or
does not answer
incoming calls
Exchanging carrier
signals but cannot
establish connection
Diagnosis
COM port
conflict
Eval board not
powered on
Data rate may be
set too high
RS-232 cable
connection
RJ-11 jack
connection
Speaker volume
setting
Digital Phone
Line
Nonworking
phone line
Outside extension
access
Bad telephone
line
Bad or poor line
conditions
PRELIMINARY
Possible Solution
Ensure you are connected to the correct COM port with
no conflicts.
Turn on the power for the eval board and ensure the red
LED glows.
Set the data rate in the terminal program settings to 9600
bps or lower.
Ensure a good cable is connected between the modem
and the computer. Also check for the cable connections
at the computer serial port and the modem RS-232 port.
Ensure the telephone cable is properly connected to
analog telephone line.
Ensure the volume of the speaker is not too low to be
heard.
An ANALOG phone line must be used. Many office
phone lines are digital.
The analog phone line must be working. Plug an analog
telephone into the line to determine if you can receive a
dial tone, and can dial a number.
Your telephone system may require a special character to
be dialed to access an outside line (such as a 9 ).
Check the telephone line with a regular telephone to
listen for static.
Try calling again as the line conditions of the phone line
vary from call to call.
If the problem persists, attempt to connect to another
modem to determine if the problem is with the device
you are calling.
Evaluation Board User Manual
Z02215 Single-Chip Modem
UM002304-0802
26