Before dialing, you have to enter "AT&E123456" (if 123456 is your own MSN; with 1TR6 give the one-digit EAZ).
Probably you did not tell the modem emulation with "AT&E" which MSN to use. For example, use "AT&E123456" if your MSN is 123456.
ISDN differentiates different services. All outgoing calls with the modem emulation use the service "Digital Data", which is incompatible with telephone or fax, so the call never gets through.
There are several possible protocol parameters. There is HDLC, there is X.75 and there are several possible block sizes with X.75. You can tell the modem emulation about the block size with "AT&B". Mostly used is a block size of 2048 byte: "AT&B2048".
If there is really no process using your modem emulation any more, try:
cu -l /dev/ttyI0 dir +++ ath0 ~.
Can happen when the partner cannot handle the large frames from i4l and simply closes the B channel during the transfer. Try making the frames smaller with AT&B512.
Andreas Gutzwiller
andy@hippo.proxyon.imp.com wrote on 5 Dec 1996:
I had to use the following settings, otherwise I only had errors. # Prot protocol-parameter g packet-size 512 protocol-parameter g short-packets y protocol-parameter g window 7 protocol-parameter g remote-window 7 protocol-parameter v packet-size 512 Now with large packets I can get ca 7300 cps.Holger Burbach
holly@cthulhu.pfalz.de on 5 Feb 1997 had another
solution:
I have several XP users who poll without any problems. I did the following: First I set the send packet size for ttyI? to 1024 ("AT&B1024") and then set the packet size for the g protocol in UUCP: protocol-parameter g packet-size 2048 protocol-parameter g remote-packet-size 0 As I said, it works fine..