Siemens M20 Terminal Technical Description page 175

Siemens Information and Communication Products
5 Hyperterminal responds
with faulty characters
6
7 Unable to book into
network
8
9 No response from M20 to At-
commands
10 Display AT+CPIN? +CPIN: SIM PIN
requests
SIM even if
already
inserted
11
Version 8 dated 15.03.00
Hyperterminal, Serial
Procomm plus connector:
on, M20T on (id- Not 0-
le) Modem
cable.
SIM inserted, AT+COPS? ERROR
PIN entered,
M20T LED
BLINKS
SIM inserted, AT+CSQ
PIN entered,
M20T LED
BLINKS
Application uses Set
baud rate other needed baud
than 19200; no rate with
response from AT+ipr=
M20, M20 LED <rate>, store
ON to user profi-
le with
AT&W
M20/M20T only accepts 3V and
dual voltage SIM cards. Most 5V
SIMs are not
recognised
M20: Indicator for inserted SIM
(CCIN; M20 pin 53) not tied to
GND
Application notes
Terminal program Hyperterminal: to set lo-
and M20T have to cal baud rate:
have the same 1) File-settings-
LOCAL baud rate configure COM1-
setting to commu- set to 19200, OK, OK
nicate (default 2) Main Window: Call-
19200Baud) disconnect,
Call-connect
Terminal echoes Procomm-Plus: to set lo-
input keys and cal baud rate:
M20t response Options-System opti-
correctly. See also ons- Modem connec-
AT+IPR, AT&W tion- modem connection
property, set Baud rate
19200
power supply: Must be
able to supply 2A pulses
at minimum of 8V du-
ring booking into net-
work
+CSQ: value Reposition Antenna un-
smaller 7 til Signal quality more
than 11. For Data calls
signal should be more
than 19.
After power up, If the application sends a
<rate> from user command string inclu-
profile is ding AT&F then the fac-
active. tory setting
<rate>=19200 overrides
user profile settings.
Check with provider for
3V SIM cards
Check SIM card
reader
A
175