Samsung MultiXpress M537x series Service Manual page 188

4. Troubleshooting
Code NVM Name
20-920 CNG Detection Count
20-930 Caller ID
20-940 Ext. Phone
4-52
NVM Description
CNG Tone Detection check count during
ANS/FAX mode.
This option is needed to guide Caller ID off
for user environment.
Ext. Phone Detection Enable/Disable (Default
: Enable 1) If disabled, Ext. Phone cannot be
detected by the device.
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Default
2
Country
Value
1