GPRS

Table 3-207: +MPING Command Parameters (Cont.)

 

 

<Parameter>

Description

 

 

 

 

<TTL>

Time To Live (TTL). Specifies number of hops (hop is

 

one step, from one router to the next, on the path of a

 

datagram on an IP network), which the Echo Request

 

message may be routed over. The value is set by using

 

TTL field in IP header. Valid value range is from 1 to

 

255.

 

Default value: 64

 

 

<TOS>

The Type Of Service (TOS) is for internet service

 

quality selection. The type of service is specified along

 

the abstract parameters precedence, delay, throughput,

 

and reliability. These abstract parameters are to be

 

mapped into the actual service parameters of the

 

particular networks the datagram traverses. Minimum

 

and maximum values for TOS are 0 and 255

 

respectively. Refer to RFC 791 and RFC 2474 which

 

obsoletes RFC 791 for TOS defined values.

 

Default value: 0

 

 

<TimeOut>

Specifies the amount of time, in milliseconds, to wait

 

for the Echo Reply message that corresponds to a sent

 

Echo Request message, measured after Echo Request

 

message was sent. If the Echo Reply message is not

 

received within the time-out, +MPINGSTAT

 

unsolicited response, with <status> equal to 1, will be

 

sent to DTE. Valid value range is from 500 ms to

 

600,000 ms (10 minutes).

 

Default value: 4000

 

 

 

 

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G24-L AT Commands Reference Manual

April 15, 2008

Page 358
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PIONEERPOS G24-LC manual Ttl, Tos, TimeOut