Quectel UG Series User Manual

UMTS/HSPA Module Series
WCDMA UGxx AT Commands Manual
WCDMA_UGxx_AT_Commands_Manual Confidential / Released 92 / 247
1. To prevent the “+++” escape sequence from being misinterpreted as data, it should comply to
following sequence:
 Do not input any character within T1 time (1000ms) before inputting “+++”.
 Input “+++” within 1000ms, and no other characters can be inputted during the time.
 Do not input any character within T1 time (1000ms) after “+++” has been inputted.
 Switch to command mode, otherwise return to step 1.
2. To return from command mode back to data mode: Enter ATO
 Another way to change to command mode is through DTR, refer to AT&D command for details.
7.7. ATO Switch from Command Mode to Data Mode
ATO resumes the connection and switches back from command mode to data mode.
Parameter
OK
Maximum Response Time
300ms
Reference
V.25ter
ATO Switch from Command Mode to Data Mode
Execution Command
ATO[n]
Response
TA resumes the connection and switches back from
command mode to data mode.
If connection is not successfully resumed:
NO CARRIER
Else
TA returns to data mode from command mode CONNECT
<text>
Maximum Response Time
300ms
Reference
V.25ter
<n> 0 Switch from command mode to data mode
NOTES
Quectel
Confidential

Quectel UG Series Specifications

General

Brand	Quectel
Model	UG Series
Category	Control Unit
Language	English