ChannelCode Communication Address Code Qualifier UN/ECE 3155 D03A urn:oasis:names:specification:ubl:codelist:gc:ChannelCode urn:oasis:names:specification:ubl:codelist:gc:ChannelCode-2.0-update http://docs.oasis-open.org/ubl/os-UBL-2.0-update/cl/gc/default/ChannelCode-2.0.gc United Nations Economic Commission for Europe 6 Code Name CodeKey AA Circuit switching AB SITA AC ARINC AD AT&T mailbox AE Peripheral device AF U.S. Defense Switched Network AG U.S. federal telecommunications system AH World Wide Web AI International calling country code AJ Alternate telephone AK Videotex number AL Cellular phone AM International telephone direct line AN O.F.T.P. (ODETTE File Transfer Protocol) AO Uniform Resource Location (URL) AP Very High Frequency (VHF) radio telephone CA Cable address EI EDI transmission EM Electronic mail EX Extension FT File transfer access method FX Telefax GM GEIS (General Electric Information Service) mailbox IE IBM information exchange IM Internal mail MA Mail PB Postbox number PS Packet switching SW S.W.I.F.T. TE Telephone TG Telegraph TL Telex TM Telemail TT Teletext TX TWX XF X.400 address XG Pager XH International telephone switchboard XI National telephone direct line XJ National telephone switchboard