LCP terminated by peer

Respected Sir/Madam,
     While I am sending MMS from my application (in
every 15 seconds 
interval) through Siemens mc35i terminal from my PC
with Redhat Linux 8.0
Sometimes it shows "LCP terminated by peer" for a long
run. It does not
disappear even after rebooting  my pc and reseting
modem.  Why it
happends?  I have searched net for this. But I did not
found any good
solution. So I am requesting you please send me some
information
regarding this.
Following are 1)pppd log, 2) pppd options and 3)
dialer script of my pc.

1. pppd log
   --------
pppd[8214]: pppd 2.4.1 started by root, uid 0
pppd[8214]: Serial connection established.
pppd[8214]: using channel 517
pppd[8214]: Using interface ppp0
pppd[8214]: Connect: ppp0 <--> /dev/ttyS0
pppd[8214]: sent [LCP ConfReq id=0x1 <mru 2000>
<asyncmap 0xa0000> <magic
0x4491c193> <pcomp> <accomp>]
pppd[8214]: rcvd [LCP ConfAck id=0x1 <mru 2000>
<asyncmap 0xa0000> <magic
0x4491c193> <pcomp> <accomp>]
pppd[8214]: rcvd [LCP ConfReq id=0x3 <mru 2000>
<asyncmap 0xa0000> <pcomp>
<accomp> <magic 0x48c46a2b><auth chap MD5>]
pppd[8214]: sent [LCP ConfRej id=0x3 <auth chap MD5>]
pppd[8214]: rcvd [LCP ConfReq id=0x5 <mru 2000>
<asyncmap 0xa0000> <pcomp>
<accomp> <magic 0x48c46a2b><auth pap>]
ppd[8214]: sent [LCP ConfRej id=0x5 <auth pap>]
pppd[8214]: rcvd [LCP ConfReq id=0x7 <mru 2000>
<asyncmap 0xa0000> <pcomp>
<accomp> <magic 0x48c46a2b>]
pppd[8214]: sent [LCP ConfAck id=0x7 <mru 2000>
<asyncmap 0xa0000> <pcomp>
<accomp> <magic 0x48c46a2b>]
pppd[8214]: sent [IPCP ConfReq id=0x1 <addr 0.0.0.0>
<compress VJ 0f 01>]
pppd[8214]: sent [CCP ConfReq id=0x1 <deflate 15>
<deflate(old#) 15>]
pppd[8214]: rcvd [IPCP ConfRej id=0x1 <compress VJ 0f
01>]
pppd[8214]: sent [IPCP ConfReq id=0x2 <addr 0.0.0.0>]
pppd[8214]: rcvd [LCP ProtRej id=0x8 80 fd 01 01 00 0c
1a 04 78 00 18 04
78 00]
pppd[8214]: sent [IPCP ConfReq id=0x2 <addr 0.0.0.0>]
pppd[8214]: sent [IPCP ConfReq id=0x2 <addr 0.0.0.0>]
pppd[8214]: rcvd [LCP TermReq id=0x9]
pppd[8214]: LCP terminated by peer
pppd[8214]: sent [LCP TermAck id=0x9]
pppd[8214]: rcvd [LCP TermReq id=0x9]
pppd[8214]: sent [LCP TermAck id=0x9]
pppd[8214]: Connection terminated.
pppd[8214]: Exit.

2. command to execute pppd daemon.
   -------------------------------
/usr/sbin/pppd /dev/ttyS0 57600 debug lock modem
crtscts noauth mru 2000
mtu 2000 asyncmap 0xa0000 kdebug 7 nobsdcomp idle 3600
nodefaultroute
noipdefault ipcp-accept-local ipcp-accept-remote
silent connect mms_dialer

3. pppd chat dialer script(mms_dialer)
   -----------------------
chat -v ABORT "BUSY"  ABORT "NO DIALTONE"  ABORT "NO
CARRIER"  ABORT
"ERROR"  ABORT "NO ANSWER"  ""  "ATZ"  OK
AT+CGDCONT=1,"IP","airtelmms.com"   OK ATD*99***1 
CONNECT ""

Thanks & Regards
Rabindra Nath Mandal



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