| To quickly reset menu language to English, simply
type: *#0000# when the phone displays the networks available press * and it will show the full name. Pin-Outs: Bottom view, keyboard up, 1 = + external power supply (7.2Volt - 600mA) ----------- To check the phone's software (firmware revision
information) type:
To see the Full Network Name: Go to the Network menu, when the phone displays the networks available press * and it will show the full name. To view the full operator list: Go to the 'Edit list' menu under 'networks'. The phone says 'please wait'. When finished, Press the < key once, then YES twice. Now the full list show be displayed. Browse through the list using the < > keys.
Pinout of the GA628. Bottom view, keyboard up, counting from the right:
All signals seem to be at 5V logic. Most debug messages are text. Like "CB ok!" etc. Debug messages are trailed by 0x0A, 0x0D. Power-up means removal of battery, reconnection of battery, depressure of "NO". Command setThe following commands are recognised: AT+GMI Manufacturer identification AT+GMO Request model Identification AT+GMR Request revision Identification AT+GMM ATDxxx; Dial number xxx (note the semicolon (;)) ATH Hangup phone AT+CFUN=? Define levels of fuctionality in the order of power consumed AT+CBC Query battery level Interfacing circuitryTTL signal levels are use on the data pins of the GA628. Probably the easiest way to generate TTL signals outof a serial port is by removing the RS232 levelshifters (1488 1489 or alike) from the serial board inside your computer ! SMS Character Set b7 0 0 0 0 1 1 1 1 b6 0 0 1 1 0 0 1 1 b5 0 1 0 1 0 1 0 1 b4 b3 b2 b1 0 1 2 3 4 5 6 7 0 0 0 0 0 SP D SP 0 @ P ¿ p 0 0 0 1 1 £ SP ! 1 A Q a q 0 0 1 0 2 $ F " 2 B R b r 0 0 1 1 3 ¥ G # 3 C S c s 0 1 0 0 4 è L $ 4 D T d t 0 1 0 1 5 é W % 5 E U e u 0 1 1 0 6 ù P & 6 F V f v 0 1 1 1 7 ì Y ' 7 G W g w 1 0 0 0 8 ò S ( 8 H X h x 1 0 0 1 9 Ç Q ) 9 I Y i y 1 0 1 0 10 LF X * : J Z j z 1 0 1 1 11 Ø SP + ; K Ä k ä 1 1 0 0 12 ø Æ , < L Ö l ö 1 1 0 1 13 CR æ - = M Ñ m ñ 1 1 1 0 14 Å ß . > N Ü n ü 1 1 1 1 15 å É / ? O § o à Notes: SP Space LF Line feed (in GSM this implies a carriage return/line feed combination) CR Carriage return is forbidden by the TAP protocol and cannot be included in the message text. Hidden menus Go to MissedCall
Empty the list
Press the -> key for a second or two
The option Menu size turns up
Choose 'yes' and go from there.
An alarm clock turned up too but it never rang. I think this was
because there is no clock in the phone.
Try to type this in your Ericsson:
>*<<*<*
where < is the left arrow and > is the right one
Create Your Own Melodies For Your Ericsson 688.
Click HERE!
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