From: Naresh Sharma <naresh@letterbox.com>                       23.Dec.1996
 Subject: Problems with callback solved 


 Hi Folks,


Good News, ;-) ISDN4Linux works will bot dialout and call back. A big and
special thanks to all those who gave their inputs:

        Karsten, Michael, Carlo, and Tor.

The isdnup script is as follows (phone numbers and IP addresses have been
changed. Please note that in the Netherlands (PTT), MSN numbers include
the city code. I get -NO- errors, with the following scripts, not even
warnings (/var/log/ppp-log, /var/log/debug, /var/log/messages,
/dev/isdnctrl, are all clean of errors). At the moment, I'm working on
channel bundling possibilities with my ISP, and will post the results.
There is no problem in calling/disconnecting several times during the day.
The rest of the stuff is in ppp-options files. Check my home page after a
couple of days for the ppp-options.

_______cut__________cut________________cut________________cut_________

#!/bin/sh
########################################################################
#                                                                      #
#        ISDN Scripts by Naresh Sharma <naresh@letterbox.com>          #
#                  Use them as you wish, and enjoy.                    #
#                                                                      #
########################################################################

#### COUNTRY and CALLING CONVENTIONS

        COUTRY_CODE=31
        OUTSIDE_DIALING_CODE=0
        INTERNATIONAL_DIALING_CODE=00

#### LOCAL setup

        LOCAL_NUMBER=1234567
        LOCAL_CITY_CODE=40
        LOCAL_IP="123.123.123.123"


#### Remote Setup

        REMOTE_NUMBER=7654321
        REMOTE_CITY_CODE=15
        REMOTE_IP="123.123.123.12"

#### ISDN Device initialization

        telesctrl MyTeles 1 31

#### ISDN Device setup

        #### Callout device

        DEVICE0=ippp0
        isdnctrl addif $DEVICE0

        #### Callback device

        DEVICE1=ippp1
        isdnctrl addif $DEVICE1

#### Phone Initialization
        #### Generic
        
        #### Callout device
        isdnctrl addphone $DEVICE0 in $REMOTE_CITY_CODE$REMOTE_NUMBER
        isdnctrl addphone $DEVICE0 out $OUTSIDE_DIALING_CODE$REMOTE_CITY_CODE$REMOTE_NUMBER
        isdnctrl eaz $DEVICE0 $LOCAL_CITY_CODE$LOCAL_NUMBER
        isdnctrl encap $DEVICE0 syncppp
        isdnctrl l2_prot $DEVICE0 hdlc
        isdnctrl l3_prot $DEVICE0 trans
        isdnctrl huptimeout $DEVICE0 60
        isdnctrl chargehup $DEVICE0 on
        isdnctrl secure $DEVICE0 on
        isdnctrl cbhup $DEVICE0 off
        isdnctrl callback $DEVICE0 out
        isdnctrl ihup $DEVICE0 off


        #### Callback device
        isdnctrl addphone $DEVICE1 in $REMOTE_CITY_CODE$REMOTE_NUMBER
        isdnctrl addphone $DEVICE1  out $OUTSIDE_DIALING_CODE$REMOTE_CITY_CODE$REMOTE_NUMBER
        isdnctrl eaz $DEVICE1 $LOCAL_CITY_CODE$LOCAL_NUMBER
        isdnctrl encap $DEVICE1 syncppp
        isdnctrl l2_prot $DEVICE1 hdlc
        isdnctrl l3_prot $DEVICE1 trans
        isdnctrl huptimeout $DEVICE1 60
        isdnctrl chargehup $DEVICE1 on
        isdnctrl secure $DEVICE1 on
        isdnctrl cbhup $DEVICE1 off
        isdnctrl callback $DEVICE1 out
        isdnctrl ihup $DEVICE1 off

#### Network initialization

/sbin/ifconfig $DEVICE0 $LOCAL_IP pointopoint $REMOTE_IP metric 1
/sbin/route add default $DEVICE0

/sbin/ifconfig $DEVICE1 $LOCAL_IP pointopoint $REMOTE_IP metric 1
/sbin/route add default $DEVICE1


/sbin/ipppd /dev/ippp0 $LOCAL_IP:$REMOTE_IP defaultroute &
/sbin/ipppd /dev/ippp1 $LOCAL_IP:$REMOTE_IP defaultroute &


_______cut__________cut________________cut________________cut_________


From: Manfred.Dill   <manfred.dill@bmw.de>            23.DEC.1996
Subject: Re: Problems with callback solved


Hi Naresh,
in my opinion thats a bit overkill. One ipppd is able to handle more
than one logical channel, therefore it is possible to define many
devices on *one* ipppd and one needs only one interface.

Naresh Sharma wrote:
> 
........
.... 
> #### Phone Initialization
>         #### Generic
> 
>         #### Callout device
>         isdnctrl addphone $DEVICE0 in $REMOTE_CITY_CODE$REMOTE_NUMBER
>         isdnctrl addphone $DEVICE0 out $OUTSIDE_DIALING_CODE$REMOTE_CITY_CODE$REMOTE_NUMBER
>         isdnctrl eaz $DEVICE0 $LOCAL_CITY_CODE$LOCAL_NUMBER
>         isdnctrl encap $DEVICE0 syncppp
>         isdnctrl l2_prot $DEVICE0 hdlc
>         isdnctrl l3_prot $DEVICE0 trans
>         isdnctrl huptimeout $DEVICE0 60
>         isdnctrl chargehup $DEVICE0 on
>         isdnctrl secure $DEVICE0 on
>         isdnctrl cbhup $DEVICE0 off
>         isdnctrl callback $DEVICE0 out
>         isdnctrl ihup $DEVICE0 off
> #### Network initialization
> 
> /sbin/ifconfig $DEVICE0 $LOCAL_IP pointopoint $REMOTE_IP metric 1
> /sbin/route add default $DEVICE0
> 
> /sbin/ipppd /dev/ippp0 $LOCAL_IP:$REMOTE_IP defaultroute &

At my side the stuff looks like:

/sbin/ipppd $LOCAL_IP:$REMOTE_IP \
   -if -ipdefault -vjccomp -ac -pc -bsdcomp mru 2048 mtu 2048 -detach \
   /dev/ippp0 ... if necessary .../dev/ipppn

callback would work on *one* device (without the bug in ipppd) because
the callback call could be accepted on the same device used for
requesting the callback.
AFAIK more than one ipppd is necessary if different protocols are used
(e.g hdlc and rawip or cisco)

Manfred Dill, 
BMW AG                                  Tel.:  + 89 382 49552
D-80788 Muenchen                        Fax:   + 89 382 49048
Germany                                 email: manfred.dill@bmw.de
---------------------------------------------------