Siemens TC35i Terminal User Manual

TC35i AT Command Set
4.7 AT+ICF
s
m obil e
TC35i_ATC_V02.07 Page 95 of 439 1/30/04
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2 8 data 1 parity 1 stop
[3] 8 data 0 parity 1 stop
5 7 data 1 parity 1 stop
Specifies the method of calculating the parity bit, if a parity bit is supported by
<format>.
If
<format> does not support parity, this parameter has to be omitted.
0 odd
1even
Notes
• Following settings are supported:
- 7 bits, even parity, 1 stop bit (
AT+ICF=5,1)
- 7 bits, odd parity, 1 stop bit (
AT+ICF=5,0)
- 8 bits, even parity, 1 stop bit (
AT+ICF=2,1)
- 8 bits, no parity, 1 stop bit (
AT+ICF=3)
- 8 bits, odd parity, 1 stop bit (
AT+ICF=2,0)
- 8 bits, no parity, 2 stop bits (
AT+ICF=1)
• If 7E1 and 7O1 mode are set with
AT+ICF the parity bit will, by default, not be transmitted over the air. If the
remote party requires the parity bit to be transmitted, additional settings must be made via
AT^STPB.
• When using a bit rate of 300 bps there must be a delay of 500ms before entering the next command. At bit
rates of 1200 bps the delay must be 300ms. For higher bit rates use of the default delay is sufficient.
• TC35i's autobaud feature detects the bit rate currently used by the TE. However, this detection suffers some
limitations described in chapter 4.10.1. If autobauding is enabled, the
AT+ICF read command does not show
the current character framing, but the character framing that will be used when autobauding is disabled.
• For compatibility reasons, the command can be used in Multiplex mode, though the settings will not take
effect. Please note that changes made on multiplex channel 1 will be saved with
AT&W and will become active
when restarting the ME after
AT^SMSO.
• To start the multiplexer it is necessary to set the character framing to 8 bits, no parity and 1 stop bit.
• If a
<format> is selected without parity (e.g. <format>=3) and you try to activate a format with parity (e.g.
<format>=2), you need to explixitly set the parameter <parity> (e.g. AT+ICF=2,1). Otherwise you will get
'+CME ERROR: invalid index'. This is because for
<format>=3, the parameter <parity> is set to the inter-
nal value 'no parity' which is not supported by
<format>=2. (Remember that if an optional parameter is omit-
ted for which no default is stated in this specification, the value of the parameter remains unchanged).
<parity>
(num)(&W)(&V)

Siemens TC35i Terminal Specifications

General

Brand	Siemens
Model	TC35i Terminal
Category	Modem
Language	English