Troubleshooting and Repair
138
025-9416
Symptom
Possible Problems
Solution
Error “no carrier...”
Terminal not answering the
line
Verify that the Model 640 is operating
correctly.
Verify that the database line type
configuration settings are correct.
Verify that the matrix plug is installed in the
proper position.
Phone number dialing
string is incorrect
Select Edit, Locations in MCU to modify
the phone # field. Ensure that the entry
does not confuse local and modem
settings.
Computer calls, Model 640
responds “no carrier...”
Modem not configured for
“word result codes”
Check the modem manual for the proper
DIP switch settings.
Computer calls, Model 640
responds “connect,” but no
Line is too noisy or signal
is too quiet
Call the paging terminal and listen to the
modem tones. Try a different phone line or
modem.
“ready”
If Model 640 has console
option, console may
already be logged on
Verify that a console kit is not logged on.
Log off, if already ZLINKed. Only one
ZLINK connection can be active at any
given time.
Error “baud rate wrong OR
cable unplugged
Any one or combination of
the four errors listed
Verify the baud rate, cable hookup, and
terminal power.
OR using modem COMM
port OR terminal off”
Using MCU from a MS
Windows DOS-shell
Do NOT attempt to use MCU from
Windows. Exit to DOS and restart MCU.
Error “no response from
modem”
Phone number dialing
string is incorrect
Select Edit, Locations in MCU to modify
the phone # field. Ensure that the entry
does not confuse local and modem
settings.
Modem initialization string
is incorrect
Create or modify ‘modem.ini’ file in the
appropriate site subdirectory. See Section
4 for details.
Can’t ZLINK from a dumb
terminal (not same as
console kit)
DTR signal
miscommunication
Disconnect the DTR pin (4) and attempt to
ZLINK again. Once connection is
established, reconnect signal.
System doesn’t recognize
database changes
Modifications haven’t been
updated to the paging
terminal RAM disk
Execute the ZLINK
reboot
command to
initialize changes.
Summary of Contents for 640 DAPT XTRA
Page 2: ......
Page 6: ...Statements vi 025 9416...
Page 20: ...Introduction 8 025 9416...
Page 26: ...Specifications 14 025 9416...
Page 96: ...Installation 84 025 9416...
Page 126: ...Optional Equipment Installation 114 025 9416...
Page 134: ...Voice Prompts 122 025 9416...
Page 174: ...Parts Lists and Schematics 162 025 9416 Schematic...
Page 175: ...Parts Lists and Schematics 025 9416 163...
Page 176: ...Parts Lists and Schematics 164 025 9416...
Page 177: ...Parts Lists and Schematics 025 9416 165...
Page 178: ...Parts Lists and Schematics 166 025 9416...
Page 179: ...Parts Lists and Schematics 025 9416 167...
Page 180: ...Parts Lists and Schematics 168 025 9416...
Page 181: ...Parts Lists and Schematics 025 9416 169...
Page 182: ...Parts Lists and Schematics 170 025 9416 Silkscreen...
Page 185: ...Parts Lists and Schematics 025 9416 173 Schematic...
Page 186: ...Parts Lists and Schematics 174 025 9416...
Page 187: ...Parts Lists and Schematics 025 9416 175...
Page 188: ...Parts Lists and Schematics 176 025 9416...
Page 189: ...Parts Lists and Schematics 025 9416 177...
Page 190: ...Parts Lists and Schematics 178 025 9416 Silkscreen...
Page 193: ...Parts Lists and Schematics 025 9416 181 Schematic...
Page 194: ...Parts Lists and Schematics 182 025 9416...
Page 195: ...Parts Lists and Schematics 025 9416 183...
Page 196: ...Parts Lists and Schematics 184 025 9416 Silkscreen...
Page 198: ...Parts Lists and Schematics 186 025 9416 RAM Disk 702 9386B ROM Disk 702 9389B...
Page 199: ...Parts Lists and Schematics 025 9416 187 TNPP Interface 702 9362C 2...
Page 200: ...Parts Lists and Schematics 188 025 9416 Terminal Block Adapter 702 9470B...
Page 201: ...Parts Lists and Schematics 025 9416 189 CONFIGURATION DIAGRAMS Dual Trunk Telco DID 024 0076A...
Page 202: ...Parts Lists and Schematics 190 025 9416 Dual Trunk Telco End to End 024 0077A...
Page 203: ...Parts Lists and Schematics 025 9416 191 Dual Trunk Telco E M 024 0078A...
Page 204: ...Parts Lists and Schematics 192 025 9416 Dual Trunk Telco Ground Start 024 0079A...
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