GE863-QUAD / PY Software User Guide
GE863-QUAD / PY Software User Guide GE863-QUAD / PY Software User Guide
GE863-QUAD / PY Software User Guide 1vv0300746 Rev. 1 - 23/10/06 4.2 Preliminary GPRS context parameters setting 4.2.1 Context parameter setting The context parameters are all the set of information to identify the internet entry point interface provided by the ISP. With these parameter the GPRS network identifies the ISP to be used to gain access to the internet and defines the value of the IP address of the GPRS device once connected. • send command AT+CGDCONT[=[[,[,[,[,[,[, [,…[,pdN]]]]]]]]]]cr> where: - (PDP Context Identifier) numeric parameter which specifies a particular PDP context definition. 1..max - where the value of max is returned by the Test command - (Packet Data Protocol type) a string parameter which specifies the type of packet data protocol "IP" - Internet Protocol "PPP" - Point to Point Protocol - (Access Point Name) a string parameter which is a logical name that is used to select the GGSN or the external packet data network. If the value is null or omitted, then the subscription value will be requested. - a string parameter that identifies the terminal in the address space applicable to the PDP. The allocated address may be read using the +CGPADDR command. - numeric parameter that controls PDP data compression 0 - off (default if value is omitted) 1 - on - numeric parameter that controls PDP header compression 0 - off (default if value is omitted) 1 - on , …, - zero to N string parameters whose meanings are specific to the Note: a special form of the Set command, +CGDCONT=, causes the values for context number to become undefined. Note 1 : issuing AT+CGDCONT is the same as issuing the Read command. Note 2 : issuing AT+CGDCONT= returns the OK result code. Reproduction forbidden without Telit Communications S.p.A. written authorization - All Right reserved page 100 of 117
GE863-QUAD / PY Software User Guide 1vv0300746 Rev. 1 - 23/10/06 • wait for response: Response Reason Action OK Context parameters have been proceed ahead successfully stored ERROR some error occurred Check parameters and retry. For example: 1- Let's assume you want to set-up the GPRS context number 1(cid) with your GPRS connection parameters apn: uni.tim.it ip address: dynamically assigned by the ISP Packet Data protocol: Internet Protocol (IP) Data compression: OFF Header compression: OFF command: AT+CGDCONT= 1,"IP","uni.tim.it","0.0.0.0",0,0 response OK 4.2.2 Minimum Quality of the Service Requested The minimum quality of service requested parameters represent the boundary under which the connection quality is not anymore acceptable and will be terminated. • send command AT+CGQMIN=,,,,, where: is the index number of the desired context to be written (up to 5 different context). is the precedence class It applies when the network has a heavy duty and user precedence must be followed to ensure operations, the higher the priority the better the service. 0 - subscribed (default) 1 - High priority 2 - Normal priority 3 - Low priority is the delay class It represents the maximum allowable time delay class between the sending and the reception of a packet. 0 - subscribed (default) 1 - delay class 1 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Right reserved page 101 of 117
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<strong>GE863</strong>-<strong>QUAD</strong> / <strong>PY</strong> <strong>Software</strong> <strong>User</strong> <strong>Guide</strong><br />
1vv0300746 Rev. 1 - 23/10/06<br />
4.2 Preliminary GPRS context parameters setting<br />
4.2.1 Context parameter setting<br />
The context parameters are all the set of information to identify the internet entry point interface<br />
provided by the ISP. With these parameter the GPRS network identifies the ISP to be used to gain<br />
access to the internet and defines the value of the IP address of the GPRS device once connected.<br />
• send command<br />
AT+CGDCONT[=[[,[,[,[,[,[,<br />
[,…[,pdN]]]]]]]]]]cr><br />
where:<br />
- (PDP Context Identifier) numeric parameter which specifies a particular PDP context<br />
definition.<br />
1..max - where the value of max is returned by the Test command<br />
- (Packet Data Protocol type) a string parameter which specifies the type of packet data<br />
protocol<br />
"IP" - Internet Protocol<br />
"PPP" - Point to Point Protocol<br />
- (Access Point Name) a string parameter which is a logical name that is used to select the<br />
GGSN or the external packet data network. If the value is null or omitted, then the<br />
subscription value will be requested.<br />
- a string parameter that identifies the terminal in the address space applicable to the<br />
PDP. The allocated address may be read using the +CGPADDR command.<br />
- numeric parameter that controls PDP data compression<br />
0 - off (default if value is omitted)<br />
1 - on<br />
- numeric parameter that controls PDP header compression<br />
0 - off (default if value is omitted)<br />
1 - on<br />
, …, - zero to N string parameters whose meanings are specific to the <br />
Note: a special form of the Set command, +CGDCONT=, causes the values for context number<br />
to become undefined.<br />
Note 1 : issuing AT+CGDCONT is the same as issuing the Read command.<br />
Note 2 : issuing AT+CGDCONT= returns the OK result code.<br />
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Right reserved page 100 of 117
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