ERICSSON SECRET CODES OF MOBILES 688

Ericsson 688

To view IMEI number *#06#
To view Software Version enter -> * <- <- * <- * CLR (Use with Care)
To reset phone language to English *#0000#
>*<<*<*> 1-row text strings. If pressing YES you can check the phones 1-row text programming in currently selected language.

>*<<*<*>> n-row text strings. If pressing YES you can check the phones n-row text programming in currently selected language.
Pinouts
1 = + external power supply. 7.2v @ 600mA.
2 = RS232 input (TTL)
3 = GND (digital)
4 = RS232 output (TTL)
5 = +5V output. Limited.
6 = Test. Switch phone off and provide +5V and switch back on. (set comms at 9600, n,8,1)
7 = Mute (0 - Normal, 1 - In Call)
8 = Internal/external (0 - External Mic/Speak, 1 - Internal Mic/Speak)
9 = GND (analog)
10 = Related to Mic/Speak
11 = BF in
12 = BF out
Ericsson 768/788To view IMEI number *#06#
To view Software Version enter * -> * <- <- * <- *
Service Provider Lock is * <- <- * but it is now called the ME lock. There are two options after selecting yes on another menu. These are lock to Network or lock to NetSubet.
Command set
The following commands are recongnized by the phone.Use 9600 baud, 1 stopbit, 8 data bits, no parity.

ATA Pick up phone during ring
AT+GMI Manufacturer identification
AT+GMO Request model Identification
AT+GMR Request revision Identification
AT+GMM
ATDxxx; Dial number xxx
ATH Hangup phone
AT+CFUN=? Define levels of fuctionality in the order of power consumed
AT+CFUN=0 Switches off the phone
AT+CBC Query battery level

Each command has to be followed by a 0x0A, 0x0D sequence, that is carriage return - line feed. These commands will be ackowledged with an 'OK' prompt. An
incoming call is signalled by the string 'RING' sent by the phone at 9600b in normal mode.
Portable Handsfree Unit
1 Earphone: 16 Ohm
2 Microphone: <- 2 kOhm
5 Connected to 04 (GND)
Pinouts
Left to right, keyboard up.
1 Audio Out

2 Audio In

3 Accessory Sense. GND to enable External Mic and Speaker (Analog)

4 Audio Signal GND.

5 Portable handsfree In.

6 Music Mute Out, High when phone is used.

7 In Flash Memory Voltage and Service Voltage, In 0V=normal,+5V=test, +12V=test+flash

8 Logic Out, Status On. Sources over 100mA

9 Data Out from Mobile Station. Debug messages appear here at 112KBaud when in debug mode.

10 Digital Ground and DC return

11 Data in

12 DC in for battery charging, DC out for accessory power