Cinterion
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EHS6 AT Command Set
4.7 AT+IPR
EHS6_ATC_V03.001 15/12/3
Confidential / Released
Page 110 of 513
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Note
• Generally, AT+IPR should be used as a standalone command as specified in in Section 1.5.2, Concatenating
AT Commands.
If nevertheless combinations with other commands on the same command line cannot be avoided, there are
several constraints to be considered:
- Avoid combinations with the AT commands listed in Section 1.5.2, Concatenating AT Commands.
- Keep in mind that there shall be a minimum pause between two AT commands as specified in Section 1.6,
Communication between Customer Application and EHS6.
- If switching to the new bit rate takes effect while a response is being transmitted, the last bytes may be
sent with the new bit rate and thus, not properly transmitted. The following commands will be correctly sent
at the new bit rate.
Please consider this effect especially when local echo is active (ATE1).
4.7.1 Autobauding
To take advantage of Autobaud mode specific attention must be paid to the following requirements:
• Autobaud mode does not take effect immediately after executing the write command AT+IPR=0. Instead the
old bit rate remains active. Autobaud mode will be activated with every restart of the ME.
• If Autobaud mode is set, ensure that the ME detects the bit rate set in the TE. To do so, enter an "AT" or "at"
string each time after restarting the ME. (Note that other strings, such as "a", "At" or "aT" will not be detected.)
After detecting the bit rate the ME will send the "^SYSSTART" URC.
Other URCs that may have been buffered before the bit rate was detected will be printed after the "^SYS-
START" URC. For example, if SIM PIN1 password request is disabled (AT+CLCK="SC",0,"xxxx") the
"+PBREADY" URC may follow after the "^SYSSTART" URC.
• After the successful synchronization between TE and ME the Autobaud mode mechanism of the ME is deac-
tivated until next restart. So, while Autobaud mode is set you will need to restart the ME each time after chang-
ing the bit rate of the TE.
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