D channel (Delta channel or Data channel)

• HSUPA (High Speed Uplink Packet Access)
• HTCPCP (Hyper Text Coffee Pot Control Protocol)
• HTML (Hypertext Markup Language)
• hub
• Huffman coding
• Huh?
• human
• hunt
• hunt group
• Hush-a-Phone Decision
• Hush-a-Phone Decision
• HV (High Voltage)
• HV (High Voltage)
• hybrid
• Hybrid ARQ II (Hybrid Automatic Repeat reQuest II)
• hybrid fiber/coax (HFC)
• hybrid KTS
• hybrid TDM/IP PBX
• hydroxyl (OH)
• hyperlink
• hypermedia
• hypertext
• Hyper Text Coffee Pot Control Protocol (HTCPCP)
• Hypertext Editing System
• Hypertext Markup Language (HTML)