Dear Tapan, The dmesg output sounds very good. Now you ought to have the following devices : /dev/modem, /dev/537ep and /dev/537ep0. >From your lsmod, I cannot see a 8250 serial driver. What does $ lspci -vvv now says ? Regards, - http://vouters.dyndns.org:8080/ Philippe Vouters (Fontainebleau/France) > Dear Philippe > I have done make install but it did not crash > > Here is the dmesg log > > > > softserial:init_module() > hamcore module init > sound disabled > Intel 537EP card found > softcore: init struct done > softserial: venid 1543, dev 3052 > softserial_register_tty(): tty registered > softserial: init done > > Here is the lsmod output > > Module Size Used by > Intel537 4319588 1 > fuse 49436 2 > i915 53380 2 > drm 158260 3 i915 > ipt_MASQUERADE 6528 1 > iptable_nat 8712 1 > nf_nat 17944 2 ipt_MASQUERADE,iptable_nat > sco 12932 2 > bridge 43668 0 > stp 6148 1 bridge > bnep 14848 2 > l2cap 21504 3 bnep > bluetooth 48608 5 sco,bnep,l2cap > coretemp 9344 0 > hwmon 6300 1 coretemp > sunrpc 155924 3 > ip6t_REJECT 7296 2 > nf_conntrack_ipv6 15864 2 > ip6table_filter 6400 1 > ip6_tables 14736 1 ip6table_filter > ipv6 230132 30 ip6t_REJECT,nf_conntrack_ipv6 > cpufreq_ondemand 9996 2 > acpi_cpufreq 12172 0 > dm_multipath 17164 0 > uinput 10624 0 > snd_hda_intel 351124 1 > snd_seq_dummy 6660 0 > snd_seq_oss 30364 0 > snd_seq_midi_event 9600 1 snd_seq_oss > snd_seq 48576 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event > snd_seq_device 10124 3 snd_seq_dummy,snd_seq_oss,snd_seq > snd_pcm_oss 42496 0 > snd_mixer_oss 16896 1 snd_pcm_oss > snd_pcm 65924 2 snd_hda_intel,snd_pcm_oss > snd_timer 22024 2 snd_seq,snd_pcm > snd_page_alloc 11016 2 snd_hda_intel,snd_pcm > snd_hwdep 10500 1 snd_hda_intel > snd 50616 12 > snd_hda_intel,snd_seq_dummy,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer,snd_hwdep > soundcore 9416 1 snd > iTCO_wdt 13732 0 > iTCO_vendor_support 6916 1 iTCO_wdt > ppdev 10372 0 > parport_pc 25620 0 > i2c_i801 12048 0 > i2c_core 21396 2 drm,i2c_i801 > e100 33804 0 > mii 8192 1 e100 > parport 31956 2 ppdev,parport_pc > pcspkr 6272 0 > floppy 51988 0 > ata_generic 8452 0 > pata_acpi 7680 0 > > > > >