disable/enable flash cd-drive

AT+ZCDRUN=8 disable
AT+ZCDRUN=9 enable

stay online

AT+ZOPRT=5

check net-/SIMlock

AT+ZSEC?
answer: <SEC_STATUE>,<SEC_ITEMS>

< SEC_STATUE >:
0 Initializing the encryption (Insignificant SEC_ITEMS)
1 Network Lock error. (Insignificant SEC_ITEMS)
2 Network Locked
3 Unlocked or correct MCC/MNC

<SEC_ITEMS>:
0 No action
1 Network lock
2 (U)SIM card lock
3 Network Lock and (U)SIM card Lock

Unlock

+ZNCK="unlock-code"
+ZNCK?
Unlock residual time 0-5

Report signal strength +ZRSSI

Syntax
+ZRSSI parameter command syntax
Command Possible response(s)
+ZRSSI <CR><LF>+ZRSSI:<rssi>,<ecio>,<rscp><CR><LF><CR><LF>
OK<CR><LF>

<CR><LF>+CME ERROR: <err><CR><LF>


Description
This command is used to report signal strength.. Notice the command is used only in platform
6290 and 6246.
Defined values
3G network（registered to 3G network）
+ZRSSI: rssi,ecio,rscp
The unit of Rscp is 0.5dbm ( in 0.5 dBm step with no sign).
The unit of Ecio is 0.5db ( in 0.5 dB step with no sign).
The relation is: 2*rssi=rscp-ecio
e.g.
+ZRSSI: 49,8,106
Rssidbm = -rssi = -49dbm
Eciodb = -ecio/2= -4db
Rscpdbm = - rscp /2= -53dbm
2G network（there is no ecio and rscp value when registered in 2G network ，so set
value of 1000）
e.g.
+ZRSSI: rssi,1000,1000
No network e.g.
+ZRSSI ：OK
Notice! the command is used only in platform 6290 and 6246.

Set Operational Mode

AT+ZSNT=0,0,0 (Auto) - Default
AT+ZSNT=1,0,0 GPRS Only
AT+ZSNT=2,0,0 3G Only
AT+ZSNT=0,0,1 GPRS Preferred
AT+ZSNT=0,0,2 3G Preferred

Query Operational Mode

AT+ZPAS?
<CR><LF>+ZPAS:<network>,<srv_domain><CR><LF>OK<CR><LF>
<network>: the type of current network
No Service
Limited Service
GPRS
GSM
UMTS
EDGE
HSDPA
<srv_domain>: service domain
CS_ONLY: CS domain service available.
PS_ONLY: PS domain service available.
CS_PS: CS&PS domain service available.
CAMPED: camped in a cell.
example
Command: AT+ZPAS?
Response: +ZPAS: "GPRS","CS_PS"
OK

Set Band Status +ZBANDI

at+zbandi=0 • Automatic (Auto) - Default
at+zbandi=1 • UMTS 850 + GSM 900/1800
at+zbandi=2 • UMTS 2100 + GSM 900/1800 (Europe)
at+zbandi=3 • UMTS 850/2100 + GSM 900/1800
at+zbandi=4 • UMTS 850/1900 + GSM 850/1900
Notice! the command is used only in platform 6290 and 6246.


Weblinks
http://www.zte.com.au/downloads/USB_Modem_Config_Procedure.pdf