[Asterisk-Users] Accessing ISDN with avm bluetooth hardware

[Daniel Gonzalez]

Hi *,

This is my first message to this list, so I hope I am not breaking any rule with my post.


My question is the following: can I establish a voice connection over an ISDN interface by using a
bluetooth dongle to connect to the ISDN access point?

Here follow the details:

I have compiled and configured asterisk. Everything seems fine except that when I configure
asterisk to use the ISDN interface, it fails with the following message:

....
  == Loading modem driver chan_modem_i4l.so => (ISDN4Linux Emulated Modem Driver)
Jun 23 01:00:24 WARNING[16384]: chan_modem_i4l.c:144 i4l_init: Unable to set to voice mode
Jun 23 01:00:24 WARNING[16384]: chan_modem.c:396 modem_setup: Modem Initialization Failed on
'/dev/ttyI0', driver i4l.
Jun 23 01:00:24 WARNING[16384]: chan_modem.c:736 mkif: Unable to configure modem '/dev/ttyI0'
Jun 23 01:00:24 ERROR[16384]: chan_modem.c:930 load_module: Unable to register channel
'/dev/ttyI0'
  == Unregistered channel type 'Modem'
Jun 23 01:00:24 WARNING[16384]: loader.c:313 ast_load_resource: chan_modem.so: load_module failed,
returning -1
  == Unregistered channel type 'Modem'
Jun 23 01:00:24 WARNING[16384]: loader.c:359 load_modules: Loading module chan_modem.so failed!


I am using the following HW:
- AVM bluefritz usb: this is an usb dongle to connect to the ISDN adapter
- AVM bluefritz ap-x: a 'mini-PBX' which has 2 analog telephone interfaces, 1 bluetooth interface
and 1 usb interface.

With this HW I am able to connect to the Internet, but I am not able to perform voice calls.
Either it is a configuration issue (I hope), or the HW that I have has no voice capabilities.


The remote device has the following capabilities:

root at trident iaxcomm # hcitool info 00:04:0E:90:38:F6
Requesting information ...
        BD Address:  00:04:0E:90:38:F6
        Device Name: Bluetooth ISDN Access Point
        LMP Version: 1.1 (0x1) LMP Subversion: 0x1
        Manufacturer: AVM Berlin (31)
        Features: 0x2f 0xbe 0x05 0x00 0x00 0x00 0x00 0x00
                <3-slot packets> <5-slot packets> <encryption> <slot offset>
                <role switch> <RSSI> <channel quality> <SCO link>
                <HV2 packets> <HV3 packets> <A-law log> <CVSD> <power control>

This is the relevant part of the configuration files:

/etc/asterisk/modem.conf
------------------------
driver=i4l

group=1
msn=*
device => /dev/ttyI0
device => /dev/ttyI1


This is the list of modules which are loaded into my system:
root at trident iaxcomm # lsmod
Module                  Size  Used by
ppp_async              10208  0
snd_ali5451            20772  0
snd_ac97_codec         62372  1 snd_ali5451
ppp_deflate             4640  0
zlib_deflate           21784  1 ppp_deflate
zlib_inflate           21280  1 ppp_deflate
bsd_comp                5280  0
ppp_synctty             7712  1
ppp_generic            22516  8 ppp_async,ppp_deflate,bsd_comp,ppp_synctty
slhc                    6368  1 ppp_generic
capidrv                30036  1
isdn                  110464  1 capidrv
capi                   16416  6
capifs                  3912  2 capi
cmtp                   16896  3
kernelcapi             43584  3 capidrv,capi,cmtp
l2cap                  21540  3 cmtp
snd_pcm_oss            50724  0
snd_pcm                88196  2 snd_ali5451,snd_pcm_oss
snd_page_alloc          9060  1 snd_pcm
snd_timer              22468  1 snd_pcm
snd_mixer_oss          18144  1 snd_pcm_oss
snd                    48836  6
snd_ali5451,snd_ac97_codec,snd_pcm_oss,snd_pcm,snd_timer,snd_mixer_oss
bfusb                  11008  3
firmware_class          7616  1 bfusb
bluetooth              44804  7 cmtp,l2cap,bfusb
usb_storage            26912  0
ohci_hcd               17284  0
ntfs                   86764  1


capifs is mounted too (I am not sure I need this, though):
root at trident iaxcomm # mount
...
capifs on /dev/capi type capifs (rw)


These are the contents of /proc/capi

----------------------> /proc/capi/capidrv
0 0 111 0

----------------------> /proc/capi/capi20ncci
2 0x10101

----------------------> /proc/capi/capi20
0 0 0 0 0 0
0 2 7868 7482 7488 7862

----------------------> /proc/capi/driver

----------------------> /proc/capi/applstats
1 0 0 111 0
2 7868 7482 7488 7862

----------------------> /proc/capi/applications
1 -2 16 2048
2 2 8 2048

----------------------> /proc/capi/contrstats
1 8998 8482 8611 8980

----------------------> /proc/capi/controller
1 cmtp       running  00:04:0E:90:38:F6 CAPI Message Transport Protocol

----------------------> /proc/capi/controllers/1
CAPI Message Transport Protocol

addr 00:04:0E:90:38:F6
ctrl 1
appl 2 -> 5