SIM800 datasheet(97/380 Pages) SIMCOM

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SIM800 Series_AT Command Manual_V1.09

2015-08-03

<N2>

Maximum number of re-transmissions

0-100

Default:3

<T2>

Max Response Timer for the multiplexer control channel in

units of ten milliseconds

2-255

Default:30

<T3>

Wake up Max Response Timers in seconds

1-255

Default:10

<k>

Window size, for Advanced operation with Error Recovery

options

1-7

Default:2

Response

If error is related to ME functionality:

+CME ERROR: <err>

Write Command

AT+CMUX=<mo

de>

Parameters

<mode>

Multiplexer transparency mechanism

0 Basic option

Parameter Saving

Mode

NO_SAVE

Max

Response

Time

Reference

3GPP TS 27.007

[13]

Note

The multiplexing transmission rate is according to the current serial baud

rate. It is recommended to enable multiplexing protocol under 115200

bit/s baud rate

Multiplexer control channels are listed as follows:

Channel Number

Type

DLCI

None

Multiplexer Control

3GPP TS 27.007 and 005

3.2.39 AT+CNUM

Subscriber Number

AT+CNUM

Subscriber Number

Test Command

AT+CNUM=?

Response

Execution

Command

AT+CNUM

Response

+CNUM: [<alpha1>],<number1>,<type1>[,<speed>,<service>]

[<CR><LF>+CNUM:[<alpha2>],<number2>,<type2>[,<speed>,<serv

ice>]

[...]]

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