I have a Digium TE110P card in my computer, but no T1 hooked up to it yet. Here is the lspci -v entry: 01:01.0 Network controller: Tiger Jet Network Inc. Tiger3XX Modem/ISDN interface Subsystem: Unknown device 79fe:0001 Flags: bus master, medium devsel, latency 64, IRQ 10 I/O ports at de00 [size=256] Memory at feafe000 (32-bit, non-prefetchable) [size=4K] Capabilities: [40] Power Management version 2 Here is my /etc/zaptel.conf -- note I stripped all the comments for size: ============================================================================= [root@linux79 ~]# cat /etc/zaptel.conf | grep -v -e "^#" span=1,1,0,esf,b8zs bchan=1-23 dchan=24 loadzone = us defaultzone=us [root@linux79 ~]# ============================================================================= Here is my /etc/asterisk/zapata.conf: ============================================================================= [root@linux79 ~]# cat /etc/asterisk/zapata.conf | grep -v -e "^;" [trunkgroups] [channels] signalling=pri_cpe switchtype=national overlapdial=no pridialplan=unknown callgroup=1 pickupgroup=1 immediate=no echocancel=yes echocancelwhenbridged=yes context=from-trunk musiconhold=default group=1 channel=>1-23 faxdetect=incoming usecallingpres=yes [root@linux79 ~]# ============================================================================= Here is the output of ztcfg: [root@linux79 ~]# ztcfg -vvvv Zaptel Configuration ====================== SPAN 1: ESF/B8ZS Build-out: 0 db (CSU)/0-133 feet (DSX-1) Channel map: Channel 01: Clear channel (Default) (Slaves: 01) Channel 02: Clear channel (Default) (Slaves: 02) Channel 03: Clear channel (Default) (Slaves: 03) Channel 04: Clear channel (Default) (Slaves: 04) Channel 05: Clear channel (Default) (Slaves: 05) Channel 06: Clear channel (Default) (Slaves: 06) Channel 07: Clear channel (Default) (Slaves: 07) Channel 08: Clear channel (Default) (Slaves: 08) Channel 09: Clear channel (Default) (Slaves: 09) Channel 10: Clear channel (Default) (Slaves: 10) Channel 11: Clear channel (Default) (Slaves: 11) Channel 12: Clear channel (Default) (Slaves: 12) Channel 13: Clear channel (Default) (Slaves: 13) Channel 14: Clear channel (Default) (Slaves: 14) Channel 15: Clear channel (Default) (Slaves: 15) Channel 16: Clear channel (Default) (Slaves: 16) Channel 17: Clear channel (Default) (Slaves: 17) Channel 18: Clear channel (Default) (Slaves: 18) Channel 19: Clear channel (Default) (Slaves: 19) Channel 20: Clear channel (Default) (Slaves: 20) Channel 21: Clear channel (Default) (Slaves: 21) Channel 22: Clear channel (Default) (Slaves: 22) Channel 23: Clear channel (Default) (Slaves: 23) Channel 24: D-channel (Default) (Slaves: 24) 24 channels configured. ZT_SPANCONFIG failed on span 1: No such device or address (6) [root@linux79 ~]# When I run asterisk, it fails, and here is the end of /var/log/asterisk/full: [root@linux79 ~]# tail -n 50 /var/log/asterisk/full Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Added extension '500' priority 2 to ael-demo Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Added extension '500' priority 3 to ael-demo Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Added extension '500' priority 4 to ael-demo Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Added extension '600' priority 1 to ael-demo Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Added extension '600' priority 2 to ael-demo Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Added extension '600' priority 3 to ael-demo Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Added extension '600' priority 4 to ael-demo Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Added extension '_1234' priority 1 to ael-demo Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Added extension '#' priority 1 to ael-demo Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Added extension '#' priority 2 to ael-demo Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Added extension 't' priority 1 to ael-demo Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Added extension 'i' priority 1 to ael-demo Sep 8 14:27:51 WARNING[3812] pbx.c: Context 'from-internal' tries includes nonexistent context 'from-internal-custom' Sep 8 14:27:51 WARNING[3812] pbx.c: Context 'from-internal' tries includes nonexistent context 'ext-queues' Sep 8 14:27:51 WARNING[3812] pbx.c: Context 'from-pstn' tries includes nonexistent context 'from-pstn-custom' Sep 8 14:27:51 WARNING[3812] pbx.c: Context 'outrt-001-9_outside' tries includes nonexistent context 'outrt-001-9_outside-custom' Sep 8 14:27:51 WARNING[3812] pbx.c: Context 'outbound-allroutes' tries includes nonexistent context 'outbound-allroutes-custom' Sep 8 14:27:51 WARNING[3812] pbx.c: Context 'ext-group' tries includes nonexistent context 'ext-group-custom' Sep 8 14:27:51 WARNING[3812] pbx.c: Context 'ext-local' tries includes nonexistent context 'ext-local-custom' Sep 8 14:27:51 VERBOSE[3812] logger.c: [chan_mgcp.so]Sep 8 14:27:51 VERBOSE[3812] logger.c: [chan_mgcp.so] => (Media Gateway Control Protocol (MGCP)) Sep 8 14:27:51 VERBOSE[3812] logger.c: == Parsing '/etc/asterisk/mgcp.conf': Sep 8 14:27:51 VERBOSE[3812] logger.c: == Parsing '/etc/asterisk/mgcp.conf': Found Sep 8 14:27:51 VERBOSE[3812] logger.c: == MGCP Listening on 0.0.0.0:2727 Sep 8 14:27:51 VERBOSE[3812] logger.c: == Using TOS bits 0 Sep 8 14:27:51 VERBOSE[3812] logger.c: == Registered channel type 'MGCP' (Media Gateway Control Protocol (MGCP)) Sep 8 14:27:51 VERBOSE[3812] logger.c: [skipping chan_oss.so] Sep 8 14:27:51 VERBOSE[3812] logger.c: [chan_iax2.so]Sep 8 14:27:51 VERBOSE[3812] logger.c: [chan_iax2.so] => (Inter Asterisk eXchange (Ver 2)) Sep 8 14:27:51 VERBOSE[3812] logger.c: == Registered custom function IAXPEER Sep 8 14:27:51 WARNING[3812] chan_iax2.c: Unable to open IAX timing interface: No such device or address Sep 8 14:27:51 VERBOSE[3812] logger.c: == Registered application 'IAX2Provision' Sep 8 14:27:51 VERBOSE[3812] logger.c: == Manager registered action IAXpeers Sep 8 14:27:51 VERBOSE[3812] logger.c: == Manager registered action IAXnetstats Sep 8 14:27:51 VERBOSE[3812] logger.c: == Parsing '/etc/asterisk/iax.conf': Sep 8 14:27:51 VERBOSE[3812] logger.c: == Parsing '/etc/asterisk/iax.conf': Found Sep 8 14:27:51 VERBOSE[3812] logger.c: == Parsing '/etc/asterisk/iax_additional.conf': Sep 8 14:27:51 VERBOSE[3812] logger.c: == Parsing '/etc/asterisk/iax_additional.conf': Found Sep 8 14:27:51 VERBOSE[3812] logger.c: == Using TOS bits 0 Sep 8 14:27:51 VERBOSE[3812] logger.c: == Binding IAX2 to '0.0.0.0:4569' Sep 8 14:27:51 VERBOSE[3812] logger.c: == Registered channel type 'IAX2' (Inter Asterisk eXchange Driver (Ver 2)) Sep 8 14:27:51 VERBOSE[3812] logger.c: == IAX Ready and Listening Sep 8 14:27:51 VERBOSE[3812] logger.c: == Loaded firmware 'iaxy.bin' Sep 8 14:27:51 VERBOSE[3812] logger.c: == Parsing '/etc/asterisk/iaxprov.conf': Sep 8 14:27:51 VERBOSE[3812] logger.c: == Parsing '/etc/asterisk/iaxprov.conf': Found Sep 8 14:27:51 VERBOSE[3812] logger.c: -- Loaded provisioning template 'default' Sep 8 14:27:51 VERBOSE[3812] logger.c: [chan_features.so]Sep 8 14:27:51 VERBOSE[3812] logger.c: [chan_features.so] => (Feature Proxy Channel) Sep 8 14:27:51 VERBOSE[3812] logger.c: == Registered channel type 'Feature' (Feature Proxy Channel Driver) Sep 8 14:27:51 VERBOSE[3812] logger.c: [chan_zap.so]Sep 8 14:27:51 VERBOSE[3812] logger.c: [chan_zap.so] => (Zapata Telephony w/PRI) Sep 8 14:27:51 VERBOSE[3812] logger.c: == Parsing '/etc/asterisk/zapata.conf': Sep 8 14:27:51 VERBOSE[3812] logger.c: == Parsing '/etc/asterisk/zapata.conf': Found Sep 8 14:27:51 WARNING[3812] chan_zap.c: Unable to specify channel 1: No such device or address Sep 8 14:27:51 ERROR[3812] chan_zap.c: Unable to open channel 1: No such device or address here = 0, tmp->channel = 1, channel = 1 Sep 8 14:27:51 ERROR[3812] chan_zap.c: Unable to register channel '1-23' Sep 8 14:27:51 WARNING[3812] loader.c: chan_zap.so: load_module failed, returning -1 Sep 8 14:27:51 WARNING[3812] loader.c: Loading module chan_zap.so failed! [root@linux79 ~]# Is this due to no live T1 being actually connected ? I tried adding channels=1-24 in both .conf files also. here is /proc/interrupts: =============================================== [root@linux79 ~]# cat /proc/interrupts CPU0 0: 2825083 IO-APIC-edge timer 1: 164 IO-APIC-edge i8042 7: 0 IO-APIC-edge parport0 8: 1 IO-APIC-edge rtc 9: 1 IO-APIC-level acpi 12: 67 IO-APIC-edge i8042 14: 10192 IO-APIC-edge ide0 15: 101021 IO-APIC-edge ide1 177: 30144 IO-APIC-level eth0 185: 0 IO-APIC-level Intel ICH5 193: 0 IO-APIC-level ehci_hcd:usb1 201: 1623 IO-APIC-level uhci_hcd:usb2, uhci_hcd:usb4 209: 0 IO-APIC-level uhci_hcd:usb3 NMI: 0 LOC: 2824943 ERR: 0 MIS: 0 [root@linux79 ~]# ====================================================================