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to phrases
off-hook
tel. upptagen
 English thesaurus
off-hook
abbr., telecom. off hook (oleg.vigodsky)
Off Hook
abbr., file.ext. OH
Off-Hook
IT, abbr. OH (MODEM)
off hook
telecom. off-hook (oleg.vigodsky)
off-hook: 8 phrases in 3 subjects
Communications5
Telecommunications1
Telephony2