Hi, I'm configuring a ISDN trunk using 2 old Diva PCI 2.01 ISDN cards. I followed the indications in http://www.voip-info.org/wiki-Asterisk+ISDN4Linux, and I can call and receive call perfectly.
But I have the following problem: After some seconds (between 0 and 10) Asterisk starts to write several times the following warning and eventually in 1-2 seconds the call hangs: Jan 30 16:32:15 WARNING[22599]: chan_modem_i4l.c:416 i4l_read: Warning: Dropped a signal frame Jan 30 16:32:15 WARNING[22599]: chan_modem_i4l.c:416 i4l_read: Warning: Dropped a signal frame Jan 30 16:32:15 WARNING[22599]: chan_modem_i4l.c:266 i4l_handle_escape: Overflow on modem, flushing buffers Jan 30 16:32:15 WARNING[22599]: chan_modem_i4l.c:416 i4l_read: Warning: Dropped a signal frame Jan 30 16:32:15 WARNING[22599]: chan_modem_i4l.c:416 i4l_read: Warning: Dropped a signal frame In google I have only found references to the asterisk code. I'm trying to use this in Spain with a normal ISDN connection. I'm working with the following software: * Debian GNU/Linux sarge * Linux kernel 2.6.16.38 (compiled version) * Asterisk 1.0.7 (debian package) * module tzdummy from svn * ISDN module: modprobe protocol=2,2 type=11,11 The hardware configuration follows: ... Ethernet controller: Broadcom Corporation NetXtreme BCM5700 Gigabit Ethernet Ethernet controller: Broadcom Corporation NetXtreme BCM5700 Gigabit Ethernet Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 08) Network controller: Eicon Networks Corporation Diva 2.01 S/T PCI (rev 01) Network controller: Eicon Networks Corporation Diva 2.01 S/T PCI (rev 01) ... /proc/interrups: ... 10: 13474934 XT-PIC eth1, HiSax 11: 138837 XT-PIC aic7xxx, uhci_hcd:usb1, uhci_hcd:usb2, HiSa ... My asterisk configuration follows: ----------- modem.conf ------------- [interfaces] context=entrante driver=i4l language=es type=i4l stripmsd=0 dialtype=tone mode=immediate ; ---- ISDN de LambdaStream ---- group=1 msn=981173344 incomingmsn=* dtmfmode=asterisk device => /dev/ttyI0 ; I tryed all ttyI* ports ---------------------------------- ----------- indications.conf ------------- [general] country=es ; default location ... [es] description = Spain ringcadence = 1500,3000 dial = 425 busy = 425/200,0/200 ring = 425/1500,0/3000 congestion = 425/200,0/200,425/200,0/200,425/200,0/600 callwaiting = 425/175,0/175,425/175,0/3500 dialrecall = !425/200,!0/200,!425/200,!0/200,!425/200,!0/200,425 record = 1400/500,0/15000 info = 950/330,0/1000 dialout = 500 ... ---------------------------------- I have also a working SIP configuration. I have musiconhold with madplay, but I suppose that this is irrelevant. -- Atentamente, Héctor Rivas
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