sockets - are username and password needed when setting a TCP client connection using sierra wireless modem? -

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i using following sequence of commands when trying establish gprs connection sierra wireless modem: at+wipcfg=1

at+wipbr=1,6

at+wipbr=2,6,11,"apn name"

at+wipbr=2,6,0,"user name"

at+wipbr=2,6,1,"passwd"

at+wipbr=4,6,0

at+wipcreate=2,1,"ip addr",80

at+wipdata=2,1,1

my problem don't use username or password, because given me when purchased sim card using. need ask mobile company those? or username , password fields set on server side of communication link? have tried omitting them error when using at+wipbr=4,6,0, or echo modem (no ok, no error).

any appreciated.

username/password in case of gprs used authentication via radius inside operator's network (on ggsn node). depends on mobile operator if should used or not. days of operators don't care regarding fields username , password.


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