Here is cable schematic for Alcatel BF phones.
Code:
Alcatel BF-3, BF4 interface schematic
20 (4) |\ | _____ | /|
DTR o------| >|-----|_____|-----+----------+----|< |-----+
|/ | 100 ohm + | | \ \| |
----- | |
----- 2.2uF | DZ 2V7 |
| | -----
----- | (GND)
(GND) |
|
+------------+ |
____| 1 16 |-----+
+ | | | | 2.2uF
----- | | -----
----- | | -----
2.2uF |____| 3 2 |_____| +
| | | | +
-----| 4 6 |--------| |---+
+ | | | 2.2uF | | |
----- | MAX3232 | -----
----- | | (GND)
2.2uF |_____| 5 |
3 (2) | | 4
RX o--------------------| 7 10 |----------------------o TA_MS (TX)
2 (3) | | 5
TX o--------------------| 8 9 |----------------------o AT_MS (RX)
6 (6) | | 2
DSR o--------------------| 14 11 |----------------------o AT_RCK
| | 1N4148
4 (7) | | ____ |\ | 3
RTS o--------------------| 13 12 |-+-[____]--+-| >|-----o TA_ARQ
| | | 5k6 | |/ |
| | | |
|____________| | |<-+ E
| | B ||
| +-----||--+ C
7 (5) | BC252 | 1
GND o--------------------------+------------------+----------o GND
|
RS 232 | ALCATEL BF3, BF4
25 (9) pin FEMALE ----- phone connector
(GND)
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Alcatel BF-3, BF4 Pinout description
| |
| |
| BATTERY |
| |
| |
|_______________________________________|
| | |
|_____________|_________________________|
| _______________ |
| | O O O O O | |
---------------------------------------
1 2 3 4 5
1 - GND
2 - AT_RCK
3 - TA_ARQ
4 - TA_MS (Tx)
5 - AT_MS (Rx)
WARNING !!
All pins voltage levels are 1.8v !!
Must use MAX 3232 !!
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