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Easy GPRS User Guide
80000ST10028 Rev. 0 - 02/01/07
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 11 of 35
31 - Best Effort
• wait for response:
Response
Reason
Action
OK
context parameters have been
successfully stored
proceed ahead
ERROR
some error occurred
check parameters and retry.
NOTE: If your minimum requirements are too high, then it can happen that it is impossible to
establish a GPRS connection, because the network has not enough resources to guarantee
that quality of service. If does this happen, then you shall try reducing your minimum quality
requirements.
establish a GPRS connection, because the network has not enough resources to guarantee
that quality of service. If does this happen, then you shall try reducing your minimum quality
requirements.
For example:
1- Let's assume you want to set-up the GPRS context number 1(cid) written before with your GPRS
min QoS parameters:
Precedence class: Normal priority
Delay class: subscribed
Reliability class: subscribed
Peak throughput: not less than 15,6 kbps
Mean throughput: not less than 7,8 kbps
command:
AT+CGQMIN= 1,2,0,0,5,4 <cr>
response
OK
1- Let's assume you want to set-up the GPRS context number 1(cid) written before with your GPRS
min QoS parameters:
Precedence class: Normal priority
Delay class: subscribed
Reliability class: subscribed
Peak throughput: not less than 15,6 kbps
Mean throughput: not less than 7,8 kbps
command:
AT+CGQMIN= 1,2,0,0,5,4 <cr>
response
OK
NOTE: Telit suggests to setup AT+CGQMIN=1,0,0,0,0,0
1.2.3 Requested Quality of the Service
The requested quality of service parameters represents the connection quality that is requested to the
network on GPRS context activation.
•
send command
AT+CGQREQ=<cid>,<precedence>,<delay>,<reliability>,<peak>,<mean><cr>
where:
<cid> - is the index number of the desired context to be written (up to 5 different context).