Philadelphia Ranked 7th Among Most Cursed Sports Cities In America. PHILADELPHIA - JUNE 09: The Chicago Blackhawks celebrate after defeating the Philadelphia Flyers 4-3 in overtime and win the Stanley Cup in Game Six of the 2010 NHL Stanley Cup Final at the Wachovia Center on June 9, 2010 in Philadelphia, Pennsylvania.
Duplex (telecommunications) - Half duplex. 1  A half-duplex (HDX) system provides communication in both directions, but only one direction at a time (not simultaneously).
USB signals are transmitted using differential signalling on a twisted-pair data cable with 90 Ï Â± 15% characteristic impedance. 1  Low-speed (LS) and Full-speed (FS) modes use a single data pair, labelled D+ and Dâ, in half-duplex. 2  High-speed (HS) mode uses the same wire pair, but with different electrical conventions.