User guide

ENHANCED IP STACK AT COMMANDS

151 AT Commands for EV-DO-EV3 Modems

Parameters and Values

<IPaddr> String type. Address of the remote host. This parameter can be either:

 Any valid IP address in the format: “xxx.xxx.xxx.xxx”.

 Any host name to be solved with a DNS query.

<retryNum> The number of ping echo request to send. Range is 1-64. Default: 4.

<len> The length of ping echo request message. Range is 32-1460. Default: 32.

<timeout> The timeout, in 100 ms units, waiting a single echo reply. Range is 1-600. Default: 50.

<ttl> Time to live. Range is 1-255. Default: 128.

Once the single echo reply message is received, a string like the following is displayed:

#PING: <replyId>,<Ip Address>,<replyTime>,<ttl>

where:

<replyId> Echo reply number.

<IP Address> IP address of the remote host

<replyTime> Time, in 100 ms units, required to receive the response.

<ttl> Time to live of the echo reply message.

Notes

 Multi-Tech recommends increasing the default timeout value to allow the cellular network to respond.

 When the echo request timeout expires (no reply received on time) the response contains <replyTime> set

to 600 and <ttl> set to 255.

 Activate the CDMA context with AT#SGACT, before sending the PING request.

Example

AT#PING=google.com,4,32,600,128

#PING: 00,"74.125.227.99",147,54

#PING: 01,"74.125.227.99",152,54

#PING: 02,"74.125.227.99",296,54

#PING: 03,"74.125.227.99",163,54

Maximum TCP Payload Size #TCPMAXDAT

Set command allows you to set the maximum TCP payload size in TCP header options.

Read command reports the current maximum TCP payload, in the format:

#TCPMAXDAT: <size>

Test command reports the supported range of values for the <size> parameter.