At command analysis-URC analysis

1. URC: +cr:xxx

When the at+cr=1 is set, if there is a data connection, the baseband will send the "+cr:xxx" character before sending connect (or possibly connect xxx), and the type of the current data connection in the table method:

+cr:async represents a transparent asynchronous transport link

+cr:sync represents a transparent synchronous transport link

+cr:rel Async represents a non-transparent asynchronous transport link

+cr:rel Sync represents a non-transparent synchronous transport link

+cr:gprs PPP may not have "PPP", indicating GPRS data connection, GPRS data connection is transparent asynchronous transmission link

2. URC: +crc:xxx

When the at+crc=1 is set, when there is a connection, the baseband will send out the +crc:xxx type, XXX indicates the current data connection type

+cr:async represents a transparent asynchronous transport link

+cr:sync represents a transparent synchronous transport link

+cr:rel Async represents a non-transparent asynchronous transport link

+cr:rel Sync represents a non-transparent synchronous transport link

All of the above are data connections returned

+cr:fax means fax

+cr:voice represents voice

3. URC: +clip:xxx

After setting at+clip=1, when there is a call, after each ring (or +cring:xxx) will follow the +clip:xxx content, you can obtain the current call specific information.

such as: +clip: "10086", 129,1,, "Fred", that is, call number "10086", in the telephone book named "FRED"

4. URC: +clop:xxx

After setting the at+clop=1, there will be +clop:xxx word Fu Congki when there is a phone call out

Look at the at manual, which is related to call transfer, do not know where the relationship.

5. Urc:+ccwa:xxx

After setting the at+ccwa=1,1, if there is a call waiting, baseband will send +ccwa:xxx content, from which can analyze the telephone number and other information