asterisk, zapterl/dahdi, pri, ss7, bri, mISDN and linux here. to get my info, please google "asterisk and james.zhu"
Conducted lot of docs for asterisk installation, troubleshoot, wiki.
2004-2007 worked with digium distributor, provided asterisk/trixbox, digium card support.
2007- Mar/2011 worked in openvox, provided tech support and take Tech Support Department, left from Mar/2011.
2011-> start playing sangoma, digium, redfone and gateway.
website: www.voipviews.com