data communication equipment
preferred label: تجهیزات ارتباط داده‌ها @fa
type: Concept
narrower: modem

modulators
preferred label: تلفیق‌کننده @fa
type: Concept
narrower: modem

demodulators
preferred label: وامدوله‌ساز @fa
type: Concept
narrower: modem

modem
broader: demodulators
broader: data communication equipment
broader: modulators
preferred label: مودم @fa
alternative label: modulator-demodulators
related: add-on board
type: Concept
scope note: modulator-demodulators

add-on board
preferred label: برد برافزا @fa
type: Concept
related: modem