telephone system
preferred label: دستگاه تلفن @fa
type: Concept
related: telephone circuit

telephone equipment
preferred label: تجهیزات تلفن @fa
type: Concept
related: telephone circuit

telephone
preferred label: تلفن @fa
type: Concept
related: telephone circuit

telephone circuit
related: telephone equipment
related: telephone
related: telephone system
broader: network (circuit)
preferred label: مدار تلفن @fa
type: Concept

network (circuit)
preferred label: شبکه (مدار) @fa
type: Concept
narrower: telephone circuit