Published July 22nd, 2007
in Techical Stuff! and COMMZGATE Products.
If you are programming an application to interface with an GSM modem hardware device to send and receive SMS Text Messages, you will most likely be communicating with the GSM modem device using AT Commands.
When issuing commands to the GSM modem device, you will get back a series of return codes from the device, which is in turn a result of how the GSM modem device had interacted with the GSM network.
The return codes are in the form of 1 to 3 digit numbers.
Here is the full list of the possible return codes and what they mean:
CMS Error code list for GSM Modem devices
1 - “Unassigned (unallocated) number”
This cause indicates that the destination requested by the Mobile Station cannot be reached because, although the number is in a valid format, it is not currently assigned (allocated).
8 - “Operator determined barring”
This cause indicates that the MS has tried to send a mobile originating short message when the MS’s network operator or service provider has forbidden such transactions.
10 - “Call barred”
This cause indicates that the outgoing call barred service applies to the short message service for the called destination.
Continue reading ‘CMS Error Codes when working with GSM Modems’
Published July 16th, 2007
in Techical Stuff!.
When sending SMS in English text, the message is actually encoded with a character set that ain’t quite the full set that you see on your computer keyboard.
As SMS messages can only carry 140 bytes worth of data, a new Alphabet was invented that will only take up 7-bits per character so that more characters can be squeezed into this 140 bytes, resulting in the current 160 character limit for SMS Text Messaging.
(Most mobile handsets will be able to decipher message transmitted in either 7-bit or 8-bit encoding, but the message transmitted in 8 bit encoding will obviously have a smaller character limit )
This new 7-bit Alphabet ( GSM 03.38) is the default character set that most SMSCs and SMS gateways support. This 7-bit Alphabet also means that there are some characters you should avoid or prevent from sending when designing your SMS sending applications.
The GSM 03.38 7-bit Alphabet set is shown as follows, along with the character’s hexadecimal equivalent representation:
| |
x0 |
x1 |
x2 |
x3 |
x4 |
x5 |
x6 |
x7 |
x8 |
x9 |
xA |
xB |
xC |
xD |
xE |
xF |
| 0x |
@ |
£ |
$ |
¥ |
è |
é |
ù |
ì |
ò |
ç |
LF |
Ø |
ø |
CR |
Å |
å |
| 1x |
Δ |
_ |
Φ |
Γ |
Λ |
Ω |
Π |
Ψ |
Σ |
Θ |
Ξ |
ESC |
Æ |
æ |
ß |
É |
| 2x |
SP |
! |
“ |
# |
¤ |
% |
& |
‘ |
( |
) |
* |
+ |
, |
- |
. |
/ |
| 3x |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
: |
; |
< |
= |
> |
? |
| 4x |
¡ |
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
N |
O |
| 5x |
P |
Q |
R |
S |
T |
U |
V |
W |
X |
Y |
Z |
Ä |
Ö |
Ñ |
Ü |
§ |
| 6x |
¿ |
a |
b |
c |
d |
e |
f |
g |
h |
i |
j |
k |
l |
m |
n |
o |
| 7x |
p |
q |
r |
s |
t |
u |
v |
w |
x |
y |
z |
ä |
ö |
ñ |
ü |
à |
The Letters A to Z and numbers 1 to 10 (plus the symbols in between) corresponds to the ACSII encoding table.
Make sure your browser has UTF-8 encoding turned on to read the table above!
Published July 2nd, 2007
in COMMZGATE Products.
Samsung mobile phones now come embedded with a range of pre-installed Java Games playable in trial mode. To activate the game you like to full action mode, simply select the ‘Activation’ button and wait for a SMS to arrive in your SMS inbox.
The SMS message will ask you to confirm the purchase of the game activation code by replying with the word ‘GAME’ back to the shortcode from which the SMS message came from. The secret activation code will hence arrive in your SMS Inbox.
Continue reading ‘Samsung ‘Try and Buy’ embedded Java Games’
