Retransmission Period (RP) setting

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Description (see setting description format info here)

 

Function:Defines the retransmission period for TCP packets

 

Set (S) command format:SRPttt, where ttt is retransmission period in 0.5 second intervals, 1-255

 

Get (G) command format:GRP

 

Init (I) command effect:Initialized unconditionally, through network command, serial command, or quick initialization

 

Post-initialization value:6 (3 seconds)

 

Change takes effect:After reboot

 

Overriding parameter:---

 

Relevance conditions:Current Transport Protocol (TP) [setting/ parameter]= 1 (TCP)

 

First introduced:[V3.34/V3.66+]

 

See also:TCP Data Connections

 


Details

 

Packet retransmission is a standard feature of TCP/IP protocol. Whenever a particular packet with data is lost the sender is supposed to retransmit this packet after a certain delay. Standard TCP implementations use variable delays that increase exponentially after each unsuccessful retry. Tibbo devices use a fixed delay specified, in 0.5 second  intervals, by the Retransmission Period.

Default retransmission period works fine on most networks. Setting it to higher value may improve DS operation on networks with significant response delays, such as those including GPRS segments.

Retransmission Period is irrelevant when Current Transport Protocol (TP) [setting/ parameter] is 0 (UDP).