Still doesn't work.
# lsmod | grep -i opvxg4xx
opvxg4xx 19499 16
dahdi 184087 31 dahdi_echocan_mg2,xpp,dahdi_transcode,wcb4xxp,wctdm,wcfxo,wctdm24xxp,wcte11xp,wct1xxp,wcte12xp,dahdi_voicebus,wct4xxp,opvxg4xx
CLI> gsm show spans
GSM span 1: Power off, Provisioned, Down, Active, Standard
GSM span 2: Power off, Provisioned, Down, Active, Standard
GSM span 3: Power off, Provisioned, Down, Active, Standard
GSM span 4: Power off, Provisioned, Down, Active, Standard
CLI> gsm power stat 1
span 1 power off
CLI> gsm power on 1
Power on span 1 sucessed
CLI> gsm power stat 1
span 1 power off
CLI> gsm power stat 2
span 2 power off
CLI> gsm power on 2
Power on span 2 sucessed
CLI> gsm power stat 2
span 2 power off
CLI> gsm power on 3
Power on span 3 sucessed
[Oct 26 10:18:49] NOTICE[1507]: chan_extra.c:6463 gsm_dchannel: GSM detect module on D-channel of span 3
[Oct 26 10:18:57] NOTICE[1507]: chan_extra.c:6463 gsm_dchannel: GSM detect module on D-channel of span 3
[Oct 26 10:19:12] NOTICE[1507]: chan_extra.c:6461 gsm_dchannel: GSM reset power of module on D-channel of span 3
[Oct 26 10:19:19] NOTICE[1507]: chan_extra.c:6463 gsm_dchannel: GSM detect module on D-channel of span 3
[Oct 26 10:19:27] NOTICE[1507]: chan_extra.c:6463 gsm_dchannel: GSM detect module on D-channel of span 3
CLI> gsm power stat 3
span 3 power off
CLI> gsm power on 4
Power on span 4 sucessed
[Oct 26 10:20:02] NOTICE[1508]: chan_extra.c:6463 gsm_dchannel: GSM detect module on D-channel of span 4
CLI> gsm power stat 4
span 4 power off