I am using the Zte Mg 880 modem on B72 to connect to internet . 
i was using the pppd and set up the things according to 

http://www.opensolaris.org/os/project/wwan/ 

it was working fine  but one day i enable disable some service and after that 
,,i m facing a  problem with this connection .. or i don't know what i did but 
its sure that i didn't modified anything regarding pppd 

after few seconds/minutes  there is no receive , and once it is down it never 
comes up . as i connect it , it works fine but soon it shows 0 receive . 
although the link is up .  even i tried to do tricks described in 

blogs.sun.com/psum/entry/solaris_and_usb_communication_device

and made entry in the /etc/system . about the  timeout , but it didn't solve 
the problem . then i tried the script from the 

http://blogs.sun.com/roller/resources/vita78/cdma_ugen_bulk_timeout

but the problem is still there . 

the chat script is

nodetach
term/1
460800
passive
defaultroute
noccp
novj
crtscts
user 9358672958
password 9358672958
usepeerdns
connect '/usr/bin/chat -V -t15 ABORT "BUSY" ABORT "NO CARRIER" "" "ATZ" "OK" 
"ATE0V1&F&D2&C1&C2S0=0" "OK" "ATE0V1" "OK" "ATS7=60" "OK" "ATQ0 V1 E1 S0=0 &C1 
&D2 +FCLASS=0" "OK" "ATDT#777" "CONNECT" ""'

can u tell me what can be the source of the problem and how to fix that.
 
 
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