Hello
I have a GSM modem (UBLOX Leon100) that I want to be able to receive SMS and keep a data connection using ppp - concurrently. So I have setup the n_gsm module according to the nice description (n_gsm.txt) found with 3.0.1. kernel release. I am using the n_gsm module from this release. My linux host is a Freescale IMX25 ARM based unit.
At first glance this works fine because I am able to create four virtual ttys (ttygsm1-4) from my physical tty. I can, concurrently, fire up four minicom terminals on each virtual tty and launch AT commands with no problem.
---
Welcome to minicom 2.2
OPTIONS: I18n
Compiled on Aug 10 2011, 13:08:56.
Port /dev/ttygsm4
Press CTRL-A Z for help on special keys
at+fmm
LEON-G100
OK
---
HOWEVER, when I want to fire up pppd (here using service wrapper) on a single virtual tty (/dev/ttygsm4) it fails. If I enable debug and dump in /etc/ppp/options this is what the log says:
root@InnBox-NOIID ~$ /etc/rc.d/init.d/ppp start
Starting the ppp daemon:
pppd options in effect:
debug # (from /etc/ppp/options)
dump # (from /etc/ppp/options)
/dev/ttygsm4 # (from /etc/ppp/peers/gprs)
115200 # (from /etc/ppp/peers/gprs)
lock # (from /etc/ppp/options)
connect /etc/ppp/chat/gprs-chat.sh # (from /etc/ppp/peers/gprs)
crtscts # (from /etc/ppp/options)
noaccomp # (from /etc/ppp/peers/gprs)
nopcomp # (from /etc/ppp/peers/gprs)
novj # (from /etc/ppp/peers/gprs)
novjccomp # (from /etc/ppp/peers/gprs)
noipdefault # (from /etc/ppp/peers/gprs)
defaultroute # (from /etc/ppp/peers/gprs)
usepeerdns # (from /etc/ppp/peers/gprs)
nobsdcomp # (from /etc/ppp/peers/gprs)
root@InnBox-NOIID ~$ cat /var/log/messages
(...)
Jan 1 01:28:45 InnBox-NOIID local2.info chat[1008]: send (ATDT*99***1#^M)
Jan 1 01:28:45 InnBox-NOIID local2.info chat[1008]: expect (CONNECT)
Jan 1 01:28:45 InnBox-NOIID local2.info chat[1008]: ^M
Jan 1 01:28:45 InnBox-NOIID local2.info chat[1008]: ATDT*99***1#^M^M
Jan 1 01:28:45 InnBox-NOIID local2.info chat[1008]: CONNECT
Jan 1 01:28:45 InnBox-NOIID local2.info chat[1008]: -- got it
Jan 1 01:28:45 InnBox-NOIID local2.info pppd[1000]: Serial connection established.
Jan 1 01:28:45 InnBox-NOIID local2.debug pppd[1000]: using channel 21
Jan 1 01:28:45 InnBox-NOIID local2.info pppd[1000]: Using interface ppp0
Jan 1 01:28:45 InnBox-NOIID local2.notice pppd[1000]: Connect: ppp0 <--> /dev/ttygsm4
Jan 1 01:28:45 InnBox-NOIID user.debug kernel: [ 5325.550000] PM: Adding info for No Bus
pp0
Jan 1 01:28:46 InnBox-NOIID local2.debug pppd[1000]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe9d66b93>]
Jan 1 01:28:49 InnBox-NOIID local2.debug pppd[1000]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe9d66b93>]
Jan 1 01:28:52 InnBox-NOIID local2.debug pppd[1000]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe9d66b93>]
Jan 1 01:28:55 InnBox-NOIID local2.debug pppd[1000]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe9d66b93>]
Jan 1 01:28:58 InnBox-NOIID local2.debug pppd[1000]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe9d66b93>]
Jan 1 01:29:01 InnBox-NOIID local2.debug pppd[1000]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe9d66b93>]
Jan 1 01:29:04 InnBox-NOIID local2.debug pppd[1000]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe9d66b93>]
Jan 1 01:29:07 InnBox-NOIID local2.debug pppd[1000]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe9d66b93>]
Jan 1 01:29:10 InnBox-NOIID local2.debug pppd[1000]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe9d66b93>]
Jan 1 01:29:13 InnBox-NOIID local2.debug pppd[1000]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe9d66b93>]
Jan 1 01:29:16 InnBox-NOIID local2.warn pppd[1000]: LCP: timeout sending Config-Requests
Jan 1 01:29:16 InnBox-NOIID local2.notice pppd[1000]: Connection terminated.
Jan 1 01:29:16 InnBox-NOIID user.debug kernel: [ 5356.600000] PM: Removing info for No Bus
pp0
Jan 1 01:29:17 InnBox-NOIID local2.notice pppd[1000]: Modem hangup
Jan 1 01:29:17 InnBox-NOIID local2.debug pppd[1000]: LCP: Down event in state 1!
Jan 1 01:29:17 InnBox-NOIID local2.info pppd[1000]: Exit.
---
As can be seen the chat script successfully reaches the CONNECT (yes, AT commands also works on virtual ttys) but after this there is no answer to the LCP ConfReq, and eventually a timeout occurs.
Changing tty parameter from virtual tty (/dev/ttygsm4) to physical tty (/dev/ttymxc2) have the result that pppd works fine with this configuration on the physical tty (no muxing, obviously)
(The physical tty is configured for HW handshaking in accordance with the pppd crtscts setting)
To get closer to understanding this we setup a testing environment to log all bytes on each side of the serial line where COM4 is the host imx25 and COM20 is the GSM UBLOX LEON 100.
The interesting part is the last part around where the LCP ConfReq are send - wrapped in the gsm 0710 protocol with F9 start stop frames.
---
8/12/2011 12:46:02.708 [COM4] - 41
8/12/2011 12:46:02.709 [COM20] - 41 54 0D
8/12/2011 12:46:02.756 [COM4] - 54 0D 0D 0A 4F 4B 0D 0A 41
8/12/2011 12:46:02.853 [COM20] - 41
8/12/2011 12:46:02.868 [COM4] - 54
8/12/2011 12:46:02.869 [COM20] - 54 0D
8/12/2011 12:46:02.900 [COM4] - 0D 0D 0A 4F 4B 0D 0A 41
8/12/2011 12:46:09.841 [COM20] - 41
8/12/2011 12:46:09.857 [COM4] - 54
8/12/2011 12:46:09.857 [COM20] - 54 0D
8/12/2011 12:46:09.889 [COM4] - 0D 0D 0A 4F 4B 0D 0A 41 54
8/12/2011 12:46:10.081 [COM20] - 41 54 2B 43 4D
8/12/2011 12:46:10.129 [COM4] - 2B 43 4D
8/12/2011 12:46:10.129 [COM20] - 55 58
8/12/2011 12:46:10.145 [COM4] - 55 58 3D
8/12/2011 12:46:10.145 [COM20] - 3D 30 2C
8/12/2011 12:46:10.177 [COM4] - 30 2C
8/12/2011 12:46:10.177 [COM20] - 30 2C 30
8/12/2011 12:46:10.209 [COM4] - 30 2C 30
8/12/2011 12:46:10.209 [COM20] - 2C
8/12/2011 12:46:10.225 [COM4] - 2C 31 32
8/12/2011 12:46:10.225 [COM20] - 31 32 37 2C
8/12/2011 12:46:10.257 [COM4] - 37 2C
8/12/2011 12:46:10.257 [COM20] - 32 35 33 2C
8/12/2011 12:46:10.305 [COM4] - 32 35 33 2C 33
8/12/2011 12:46:10.306 [COM20] - 33 2C 32 35 34
8/12/2011 12:46:10.337 [COM4] - 2C 32 35
8/12/2011 12:46:10.353 [COM20] - 2C 30 2C
8/12/2011 12:46:10.369 [COM4] - 34 2C 30
8/12/2011 12:46:10.384 [COM20] - 30 0D
8/12/2011 12:46:10.385 [COM4] - 2C 30 0D 0D 0A 4F 4B 0D 0A
8/12/2011 12:46:13.462 [COM20] - F9 03 3F 01 1C F9
8/12/2011 12:46:13.495 [COM4] - F9 03 73 01 D7 F9
8/12/2011 12:46:14.516 [COM20] - F9 07 3F 01 DE F9 F9 03 EF 09 E3 05 07 0D FB F9 F9 03 EF 09 E3 05 07 01 FB F9 F9 07 53 01 3F F9
8/12/2011 12:46:14.580 [COM4] - F9 07 73 01 15 F9 F9 01 EF 09 E1 05 07 0D 9A F9 F9 01 EF 09 E1 05 07 01 9A F9
8/12/2011 12:46:14.612 [COM20] - F9 0B 3F 01 59 F9
8/12/2011 12:46:14.627 [COM4] - F9 0B 73 01 92 F9 F9 01 EF 09 E1 05 0B 0D 9A F9
8/12/2011 12:46:14.628 [COM20] - F9 03 EF 09 E3 05 0B 0D FB F9 F9 03 EF 09 E3 05 0B 01 FB F9 F9 0B 53 01 B8 F9
8/12/2011 12:46:14.660 [COM4] - F9 01 EF 09 E1 05 0B 01 9A F9
8/12/2011 12:46:14.676 [COM20] - F9 07 53 01 3F F9 F9 0F 3F 01 9B F9 F9 03 EF 09 E3 05 0F 0D FB F9
8/12/2011 12:46:14.708 [COM4] - F9 0F 73 01 50 F9 F9 01 EF 09 E1 05 0F 0D 9A F9
8/12/2011 12:46:14.724 [COM20] - F9 03 EF 09 E3 05 0F 01 FB F9 F9 0F 53 01 7A F9
8/12/2011 12:46:14.740 [COM4] - F9 01 EF 09 E1 05 0F 01 9A F9
8/12/2011 12:46:14.756 [COM20] - F9 0B 53 01 B8 F9 F9 07 53 01 3F F9 F9 13 3F 01 96 F9 F9 03 EF 09 E3 05 13 0D FB F9
8/12/2011 12:46:14.788 [COM4] - F9 13 73 01 5D F9 F9 01 EF 09 E1 05 13 0D 9A F9
8/12/2011 12:46:14.820 [COM20] - F9 03 EF 09 E3 05 13 01 FB F9 F9 0F 53 01 7A F9
8/12/2011 12:46:14.836 [COM4] - F9 01 EF 09 E1 05 13 01 9A F9
8/12/2011 12:46:14.852 [COM20] - F9 13 53 01 77 F9 F9 0B 53 01 B8 F9 F9 0F 53 01 7A F9 F9 13 53 01 77 F9 F9 13 53 01 77 F9 F9 13 3F 01 96 F9 F9 03 EF 09 E3 05 13 0D FB F9
8/12/2011 12:46:24.764 [COM4] - F9 01 EF 09 E1 05 13 0D 9A F9 F9 13 73 01 5D F9 F9 13 1F 01 BC F9 F9 13 1F 01 BC F9 F9 13 73 01 5D F9 F9 03 EF 09 E1 05 13 0D FB F9
8/12/2011 12:46:24.779 [COM20] - F9 03 EF 09 E3 05 13 05 FB F9
8/12/2011 12:46:24.796 [COM4] - F9 01 EF 09 E1 05 13 05 9A F9
8/12/2011 12:46:24.811 [COM20] - F9 03 EF 09 E3 05 13 01 FB F9
8/12/2011 12:46:24.812 [COM4] - F9 01 EF 09 E1 05 13 01 9A F9
8/12/2011 12:46:25.844 [COM20] - F9 03 EF 09 E3 05 13 0D FB F9
8/12/2011 12:46:25.862 [COM4] - F9 01 EF 09 E1 05 13 0D 9A F9
8/12/2011 12:46:25.972 [COM20] - 41 54 2B 43 50 49 4E 3F 0D F9 13 EF 03 41 9C F9 F9 13 EF 03 54 9C F9
8/12/2011 12:46:26.102 [COM4] - F9 11 EF 03 41 FD F9
8/12/2011 12:46:26.116 [COM20] - F9 13 EF 03 5A 9C F9
8/12/2011 12:46:26.118 [COM4] - F9 11 EF 03 54 FD F9 F9 11 EF 03 5A FD F9 F9 11 EF 03 0D FD F9 F9 01 EF 0B E3 07 13 0C 01 79 F9 F9 11 EF 0D 0D 0A 4F 4B 0D 0A 17 F9
8/12/2011 12:46:26.164 [COM20] - F9 13 EF 03 0D 9C F9 F9 03 EF 0B E1 07 13 0C 01 18 F9 F9 13 EF 03 41 9C F9 F9 13 EF 03 54 9C F9
8/12/2011 12:46:26.201 [COM4] - F9 11 EF 03 41 FD F9
8/12/2011 12:46:26.218 [COM20] - F9 13 EF 03 0D 9C F9
8/12/2011 12:46:26.234 [COM4] - F9 11 EF 03 54 FD F9 F9 11 EF 03 0D FD F9 F9 11 EF 0D 0D 0A 4F 4B 0D 0A 17 F9
8/12/2011 12:46:26.260 [COM20] - F9 13 EF 03 41 9C F9 F9 13 EF 03 54 9C F9
8/12/2011 12:46:26.283 [COM4] - F9 11 EF 03 41 FD F9 F9 11 EF 03 54 FD F9
8/12/2011 12:46:26.295 [COM20] - F9 13 EF 03 2B 9C F9 F9 13 EF 03 43 9C F9
8/12/2011 12:46:26.315 [COM4] - F9 11 EF 03 2B FD F9 F9 11 EF 03 43 FD F9
8/12/2011 12:46:26.326 [COM20] - F9 13 EF 03 46 9C F9 F9 13 EF 03 55 9C F9
8/12/2011 12:46:26.343 [COM4] - F9 11 EF 03 46 FD F9 F9 11 EF 03 55 FD F9 F9 11 EF 03 4E FD F9
8/12/2011 12:46:26.375 [COM20] - F9 13 EF 03 4E 9C F9 F9 13 EF 03 3D 9C F9 F9 13 EF 03 31 9C F9
8/12/2011 12:46:26.394 [COM4] - F9 11 EF 03 3D FD F9 F9 11 EF 03 31 FD F9
8/12/2011 12:46:26.404 [COM20] - F9 13 EF 03 0D 9C F9
8/12/2011 12:46:26.422 [COM4] - F9 11 EF 03 0D FD F9 F9 11 EF 0D 0D 0A 4F 4B 0D 0A 17 F9
8/12/2011 12:46:26.452 [COM20] - F9 13 EF 03 0D 9C F9
8/12/2011 12:46:26.470 [COM4] - F9 11 EF 03 0D FD F9
8/12/2011 12:46:31.480 [COM20] - F9 13 EF 03 41 9C F9 F9 13 EF 03 54 9C F9 F9 13 EF 03 5A 9C F9
8/12/2011 12:46:31.515 [COM4] - F9 11 EF 03 41 FD F9 F9 11 EF 03 54 FD F9
8/12/2011 12:46:31.528 [COM20] - F9 13 EF 03 0D 9C F9
8/12/2011 12:46:31.547 [COM4] - F9 11 EF 03 5A FD F9 F9 11 EF 03 0D FD F9 F9 11 EF 0D 0D 0A 4F 4B 0D 0A 17 F9
8/12/2011 12:46:31.576 [COM20] - F9 13 EF 03 41 9C F9 F9 13 EF 03 54 9C F9
8/12/2011 12:46:31.595 [COM4] - F9 11 EF 03
8/12/2011 12:46:31.608 [COM20] - F9 13 EF 03 0D 9C F9
8/12/2011 12:46:31.611 [COM4] - 41 FD F9 F9 11 EF 03 54 FD F9 F9 11 EF 03 0D FD F9 F9 11 EF 0D 0D 0A 4F 4B 0D 0A 17 F9
8/12/2011 12:46:31.656 [COM20] - F9 13 EF 03 41 9C F9 F9 13 EF 03 54 9C F9 F9 13 EF 03 2B 9C F9
8/12/2011 12:46:31.691 [COM4] - F9 11 EF 03 41 FD F9 F9 11 EF 03 54 FD F9
8/12/2011 12:46:31.704 [COM20] - F9 13 EF 03 43 9C F9 F9 13 EF 03 47 9C F9
8/12/2011 12:46:31.723 [COM4] - F9 11 EF 03 2B FD F9 F9 11 EF 03 43 FD F9
8/12/2011 12:46:31.736 [COM20] - F9 13 EF 03 44 9C F9
8/12/2011 12:46:31.739 [COM4] - F9 11 EF 03 47 FD F9
8/12/2011 12:46:31.752 [COM20] - F9 13 EF 03 43 9C F9 F9 13 EF 03 4F 9C F9
8/12/2011 12:46:31.771 [COM4] - F9 11 EF 03 44 FD F9 F9 11 EF 03 43 FD F9
8/12/2011 12:46:31.800 [COM20] - F9 13 EF 03 4E 9C F9
8/12/2011 12:46:31.803 [COM4] - F9 11 EF 03 4F FD F9 F9 11 EF 03 4E FD F9
8/12/2011 12:46:31.816 [COM20] - F9 13 EF 03 54 9C F9
8/12/2011 12:46:31.819 [COM4] - F9 11 EF 03 54 FD F9
8/12/2011 12:46:31.833 [COM20] - F9 13 EF 03 3D 9C F9 F9 13 EF 03 31 9C F9 F9 13 EF 03 2C 9C F9
8/12/2011 12:46:31.851 [COM4] - F9 11 EF 03 3D FD F9 F9 11 EF 03 31 FD F9
8/12/2011 12:46:31.880 [COM20] - F9 13 EF 03 22 9C F9
8/12/2011 12:46:31.883 [COM4] - F9 11 EF 03 2C FD F9
8/12/2011 12:46:31.897 [COM20] - F9 13 EF 03 49 9C F9
8/12/2011 12:46:31.899 [COM4] - F9 11 EF 03 22 FD F9 F9 11 EF 03 49 FD F9
8/12/2011 12:46:31.915 [COM20] - F9 13 EF 03 50 9C F9 F9 13 EF 03 22 9C F9 F9 13 EF 03 2C 9C F9
8/12/2011 12:46:31.947 [COM4] - F9 11 EF 03 50 FD F9 F9 11 EF 03 22 FD F9 F9
8/12/2011 12:46:31.960 [COM20] - F9 13 EF 03 22 9C F9
8/12/2011 12:46:31.963 [COM4] - 11 EF 03 2C FD F9
8/12/2011 12:46:31.976 [COM20] - F9 13 EF 03 6D 9C F9
8/12/2011 12:46:31.979 [COM4] - F9 11 EF 03 22 FD F9 F9 11 EF 03 6D FD F9
8/12/2011 12:46:31.992 [COM20] - F9 13 EF 03 64 9C F9 F9 13 EF 03 61 9C F9
8/12/2011 12:46:32.011 [COM4] - F9 11 EF 03 64 FD F9 F9 11 EF 03 61 FD F9
8/12/2011 12:46:32.024 [COM20] - F9 13 EF 03 2E 9C F9
8/12/2011 12:46:32.027 [COM4] - F9 11 EF 03 2E FD F9
8/12/2011 12:46:32.040 [COM20] - F9 13 EF 03 69 9C F9 F9 13 EF 03 74 9C F9
8/12/2011 12:46:32.059 [COM4] - F9 11 EF 03 69 FD F9 F9 11 EF 03 74 FD F9
8/12/2011 12:46:32.072 [COM20] - F9 13 EF 03 73 9C F9 F9 13 EF 03 70 9C F9
8/12/2011 12:46:32.091 [COM4] - F9 11 EF 03 73 FD F9 F9 11 EF 03 70 FD F9 F9 11 EF 03 6C FD F9
8/12/2011 12:46:32.108 [COM20] - F9 13 EF 03 6C 9C F9 F9 13 EF 03 61 9C F9 F9 13 EF 03 74 9C F9
8/12/2011 12:46:32.138 [COM4] - F9 11 EF 03 61 FD F9 F9 11 EF 03 74 FD F9
8/12/2011 12:46:32.169 [COM20] - F9 13 EF 03 66 9C F9 F9 13 EF 03 6F 9C F9
8/12/2011 12:46:32.173 [COM4] - F9 11 EF 03 66 FD F9
8/12/2011 12:46:32.185 [COM20] - F9 13 EF 03 72 9C F9
8/12/2011 12:46:32.187 [COM4] - F9 11 EF 03 6F FD F9 F9 11 EF 03 72
8/12/2011 12:46:32.216 [COM20] - F9 13 EF 03 6D 9C F9 F9 13 EF 03 2E 9C F9 F9 13 EF 03 64 9C F9 F9 13 EF 03 6B 9C F9
8/12/2011 12:46:32.260 [COM4] - FD F9 F9 11 EF 03 6D FD F9 F9 11 EF 03 2E FD F9 F9 11 EF 03 64 FD F9 F9 11 EF 03 6B FD F9 F9 11 EF 03 22 FD F9
8/12/2011 12:46:32.280 [COM20] - F9 13 EF 03 22 9C F9 F9 13 EF 03 0D 9C F9
8/12/2011 12:46:32.315 [COM4] - F9 11 EF 03 0D FD F9 F9 11 EF 0D 0D 0A 4F 4B 0D 0A 17 F9
8/12/2011 12:46:32.328 [COM20] - F9 13 EF 03 41 9C F9 F9 13 EF 03 54 9C F9 F9 13 EF 03 44 9C F9
8/12/2011 12:46:32.363 [COM4] - F9 11 EF 03 41 FD F9 F9 11 EF 03 54 FD F9
8/12/2011 12:46:32.376 [COM20] - F9 13 EF 03 54 9C F9 F9 13 EF 03 2A 9C F9 F9 13 EF 03 39 9C F9
8/12/2011 12:46:32.402 [COM4] - F9 11 EF 03 44 FD F9 F9 11 EF 03 54 FD F9 F9 11 EF 03 2A FD F9
8/12/2011 12:46:32.410 [COM20] - F9 13 EF 03 39 9C F9 F9 13 EF 03 2A 9C F9
8/12/2011 12:46:32.428 [COM4] - F9 11 EF 03 39 FD F9 F9 11 EF 03 39 FD F9
8/12/2011 12:46:32.442 [COM20] - F9 13 EF 03 2A 9C F9 F9 13 EF 03 2A 9C F9
8/12/2011 12:46:32.460 [COM4] - F9 11 EF 03 2A FD F9 F9 11 EF 03 2A FD F9
8/12/2011 12:46:32.474 [COM20] - F9 13 EF 03 31 9C F9
8/12/2011 12:46:32.476 [COM4] - F9 11 EF 03 2A FD F9
8/12/2011 12:46:32.490 [COM20] - F9 13 EF 03 23 9C F9 F9 13 EF 03 0D 9C F9
---> CONNECT from GSM UBLOX modem
8/12/2011 12:46:32.508 [COM4] - F9 11 EF 03 31 FD F9 F9 11 EF 03 23 FD F9 F9 11 EF 03 0D FD F9 F9 01 EF 0B E3 07 13 8C 01 79 F9 F9 01 EF 0B E3 07 13 86 01 79 F9 F9 11 EF 17 0D 0A 43 4F 4E 4E 45 43 54 0D 0A E6 F9
8/12/2011 12:46:32.554 [COM20] - F9 03 EF 0B E1 07 13 8C 01 18 F9 F9 03 EF 0B E1 07 13 86 01 18 F9
8/12/2011 12:46:32.556 [COM4] - F9 01 EF 0B E3 07 13 8C 01 79 F9
8/12/2011 12:46:32.571 [COM20] - F9 03 EF 0B E1 07 13 8C 01 18 F9 F9 03 EF 09 E3 05 13 05 FB F9
8/12/2011 12:46:33.610 [COM4] - F9 01 EF 09 E1 05 13 05 9A F9
---> host imx sends 10 LCP ConfReqs - they are never received at the GSM Ublox modem side
8/12/2011 12:46:34.614 [COM20] - F9 13 EF 5B 7E FF 7D 23 C0 21 7D 21 7D 21 7D 20 7D 34 7D 21 7D 24 7D 21 28 7D 22 7D 26 7D 20 7D 20 7D 20 7D 20 7D 25 7D 26 88 95 8C 9D 36 7D 20 7E FE F9 F9 13 EF 5B 7E FF 7D 23 C0 21 7D 21 7D 21 7D 20 7D 34 7D 21 7D 24 7D 21 28 7D 22 7D 26 7D 20 7D 20 7D 20 7D 20 7D 25 7D 26 88 95 8C 9D 36 7D 20 7E FE F9 F9 13 EF 5B 7E FF 7D 23 C0 21 7D 21 7D 21 7D 20 7D 34 7D 21 7D 24 7D 21 28 7D 22 7D 26 7D 20 7D 20 7D 20 7D 20 7D 25 7D 26 88 95 8C 9D 36 7D 20 7E FE F9 F9 13 EF 5B 7E FF 7D 23 C0 21 7D 21 7D 21 7D 20 7D 34 7D 21 7D 24 7D 21 28 7D 22 7D 26 7D 20 7D 20 7D 20 7D 20 7D 25 7D 26 88 95 8C 9D 36 7D 20 7E FE F9 F9 13 EF 5B 7E FF 7D 23 C0 21 7D 21 7D 21 7D 20 7D 34 7D 21 7D 24 7D 21 28 7D 22 7D 26 7D 20 7D 20 7D 20 7D 20 7D 25 7D 26 88 95 8C 9D 36 7D 20 7E FE F9 F9 13 EF 5B 7E FF 7D 23 C0 21 7D 21 7D 21 7D 20 7D 34 7D 21 7D 24 7D 21 28 7D 22 7D 26 7D 20 7D 20 7D 20 7D 20 7D 25 7D 26 88 95 8C 9D 36 7D 20 7E FE F9 F9 13 EF 5B 7E FF 7D 23 C0 21 7D 21 7D 21 7D 20 7D 34 7D 21 7D 24 7D 21 28 7D 22 7D 26 7D 20 7D 20 7D 20 7D 20 7D 25 7D 26 88 95 8C 9D 36 7D 20 7E FE F9 F9 13 EF 5B 7E FF 7D 23 C0 21 7D 21 7D 21 7D 20 7D 34 7D 21 7D 24 7D 21 28 7D 22 7D 26 7D 20 7D 20 7D 20 7D 20 7D 25 7D 26 88 95 8C 9D 36 7D 20 7E FE F9 F9 13 EF 5B 7E FF 7D 23 C0 21 7D 21 7D 21 7D 20 7D 34 7D 21 7D 24 7D 21 28 7D 22 7D 26 7D 20 7D 20 7D 20 7D 20 7D 25 7D 26 88 95 8C 9D 36 7D 20 7E FE F9 F9 13 EF 5B 7E FF 7D 23 C0 21 7D 21 7D 21 7D 20 7D 34 7D 21 7D 24 7D 21 28 7D 22 7D 26 7D 20 7D 20 7D 20 7D 20 7D 25 7D 26 88 95 8C 9D 36 7D 20 7E FE F9 F9 03 EF 09 E3 05 13 01 FB F9
8/12/2011 12:47:04.576 [COM4] - F9 01 EF 0B E3 07 13 8C 01 79 F9 F9 01 EF 09 E1 05 13 01 9A F9 F9 11 EF 0D 0D 0A 4F 4B 0D 0A 17 F9 F9 03 EF 09 E1 05 13 01 FB F9
8/12/2011 12:47:04.585 [COM20] - F9 03 EF 0B E1 07 13 8C 01 18 F9
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Since I'm not really an expert in the gsm 3GPP TS 07.10 protocol here are my questions: Why are the LCP ConfReq never received on the GSM Ublox modem? Us it due to the 0710 protocol, e.g some n_gsm control channel signaling? Is it due to a missing pppd setting? Is it a ppp kernel or application issue? Or is it a bug in the GSM modem SW?
Has anybody had a successful experience in setting up a ppp connection from a host to a GSM UBLOX modem (or another modem) using muxed ttys?
Any help or hint to solving this issue is highly appreciated!
Thank you!
Svend Lindholm
Software Architect
Inntrasys
Email
skl@inntrasys.com
Web
www.inntrasys.com