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Custom Local-Area Signaling Services
IT, abbr.
CLASS
Custom Local Area Signaling Services
abbr., IT
CLASS
telecom., abbr.
CLASS
(Bellcore)
Custom Local Area Signaling Service
abbr., tel.
CLASS
IT, abbr.
CLASS
(Telephony)
Custom Local-Area
:
1 phrase
in 1 subject
Communications
1
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