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Communications Setup
46
025-9416
The commands in this string equate to the following:
AT
Get modem’s attention
&M0
Error Control disabled
&K0
Data Compression disabled
&I0
RX Flow Control disable
&H0
TX Flow Control disable
&N2
Force modem to 1200 baud
Note:
Do not assume that the computer’s modem responds to the above commands exactly
as described. Always check the modem manual for custom initialization commands
and their use.
The following steps will allow you to change the modem initialization string:
q
1.
Exit MCU to DOS. (Hit <Esc> repeatedly or select Other, Exit.)
q
2.
Change to the \MCU directory (if not already there), by typing at the DOS prompt:
CD C:\MCU\<my site name>
q
3.
At the DOS prompt type “EDIT modem.ini”.
q
4.
Enter the new initialization string to disable the features previously mentioned. Do
not insert spaces between commands; the string should be continuous.
q
5.
Save the file and then exit to DOS.
The next time the location is ZLINKed, the computer will look at the “modem.ini” file for the
appropriate modem commands.
Note:
If you are unsure about modem initialization commands, contact Zetron Mobile and
Paging Systems technical support for assistance. Be sure to have your modem manual
handy for easy reference before calling.
Troubleshooting Checklist
To avoid potential serial port problems, check the following:
q
Verify that the dial string to the terminal is correct.
•
If dialing over an End-to-End (POTS) line, you should hear/see the following events at
the modem installed on the PC when the MCU is dialing the Model 640.
1.
Dial tone, followed by a string of Touch Tone digits
2.
One to three rings
3.
Model 640 answers with prompt “At the tone, enter your pager number.”, followed
by a beep prompt.
4.
The PC sends the console access number (usually 0555 or 555) by way of the
modem as a string of Touch Tone digits.
5.
The Model 640 returns a solid modem tone followed shortly by the modem carrier
“hiss” as it attempts to establish a connection.
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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