Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 157 23.06.2010
network. If the value is null or omitted, then the
subscription value will be requested.
<PDP_addr> a string parameter (IP address). Format:
"<n>.<n>.<n>.<n>" where <n>=0..255
If the value is null or equals 0.0.0.0 a dynamic address
will be requested. The allocated address may be read using
the +CGPADDR command
<d_comp> a numeric parameter that controls PDP data compression
0 –PDP data compression off (default if value is omitted)
<h_comp> a numeric parameter that controls PDP data compression
0 –PDP header compression off (default if value is omitted)
.
Reference Note
7.2.2.1For <cid> 1,2 and 3 the following parameters are stored in non volatile memory:
Parameter name Default value
<cid> 1,2 or 3
Locked 0xFF..0xFF
Defined 0x00
<precedence> 0x00
<delay> 0x00
<reliability> 0x03
<peak> 0x00
<mean> 0x00
<pdp_type> 0x01 (IP)
<APN> 0xFF..0xFF
<PDP_address> 0x00..0x00
<Guaranteed bitrate DL> 0x00
<Guaranteed bitrate UL> 0x00
<Traffic handling priority> 0x00
<Transfer delay> 0x00
<SDU error ratio> 0x00
<Residual bit error ratio> 0x00
<Maximum bitrate DL> 0x00
<Maximum bitrate UL> 0x00
<Maximum SDUsize> 0x00
<Delivery of erroneous SDUs> 0x00
<Delivery order> 0x00
<Traffic class> 0x00