# Dahdi module Loading issue **URL:** \ **Category:** Asterisk Support\ **Created:** [November 15, 2011, 7:26pm UTC](https://community.asterisk.org/t/dahdi-module-loading-issue/37380 "2011-11-15T19:26:10Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![system](https://global.discourse-cdn.com/asterisk/original/2X/4/475d0c889911cfb84ac4881ad6df8b523e3f9105.png) [@system](https://community.asterisk.org/u/system)\ **Post date:** [November 15, 2011, 7:26pm UTC](https://community.asterisk.org/t/dahdi-module-loading-issue/37380/1 "2011-11-15T19:26:10Z")
I just started to configure my Rhino R4FXO-EC Card and am unable to load it now. The system recognizes the card but it is not properly loading. All ports are FXO and they will have 1 main line and 3 analog rollover lines coming in. This is my first time setting up a Dahdi Card and all SIP Phones are functioning properly and calling internally now. Output from: lspci: 04:00.0 Network controller: Rhino Equipment Corp. RCB4FXO 4-channel FXO analog telphony card debian:~# dahdi\_cfg -vvv DAHDI Tools Version - 2.5.0.1 # DAHDI Version: 2.5.0.1 Echo Canceller(s): HWEC Configuration Channel map: Channel 01: FXS Kewlstart (Default) (Echo Canceler: none) (Slaves: 01) Channel 02: FXS Kewlstart (Default) (Echo Canceler: none) (Slaves: 02) Channel 03: FXS Kewlstart (Default) (Echo Canceler: none) (Slaves: 03) Channel 04: FXS Kewlstart (Default) (Echo Canceler: none) (Slaves: 04) 4 channels to configure. DAHDI\_CHANCONFIG failed on channel 1: Invalid argument (22) Selected signaling not supported Possible causes: FXS signaling is being used on a FXS interface (use a FXO signaling variant) RBS signaling is being used on a E1 CCS span Signaling is being assigned to channel 16 of an E1 CAS span This is the error I get when I try to load the module: debian\*CLI\> module load chan\_dahdi.so Unable to load module chan\_dahdi.so Command ‘module load chan\_dahdi.so’ failed. [Nov 15 14:08:30] WARNING[3154]: pbx.c:5655 ast\_register\_application2: Already have an application ‘DAHDISendKeypadFacility’ [Nov 15 14:08:30] WARNING[3154]: chan\_dahdi.c:4250 dahdi\_open: Unable to specify channel 1: Invalid argument [Nov 15 14:08:30] ERROR[3154]: chan\_dahdi.c:12187 mkintf: Unable to open channel 1: Invalid argument here = 0, tmp-\>channel = 1, channel = 1 [Nov 15 14:08:30] ERROR[3154]: chan\_dahdi.c:16646 build\_channels: Unable to register channel ‘1’ System.conf: loadzone = us defaultzone = us fxsks=1 fxsks=2 fxsks=3 fxsks=4 Chan\_dahdi.conf: [channels] context=from-pstn signalling=fxs\_ks usecallerid=yes hidecallerid=no callwaiting=no threewaycalling=yes transfer=yes callpark=yes cancallforward=yes callreturn=yes echocancel=yes channel =\>1 channel =\>2 channel =\>3 channel =\>4 ---
**Author:** ![dejanst](https://avatars.discourse-cdn.com/v4/letter/d/9fc348/32.png) [@dejanst](https://community.asterisk.org/u/dejanst)\ **Post date:** [November 16, 2011, 8:04am UTC](https://community.asterisk.org/t/dahdi-module-loading-issue/37380/2 "2011-11-16T08:04:29Z")
Contact your hardware vendor for support.