line concentrator
type: Concept
preferred label: تمرکزساز خط جریان @fa
related: telephone line

telephone exchange
type: Concept
preferred label: مرکز تلفن @fa
related: telephone line

telephone line
type: Concept
alternative label: line (telephone)
broader: telecommunication transmission line
broader: telephone equipment
narrower: subscriber loop
preferred label: خط تلفن @fa
related: comparators (circuit)
related: line concentrator
related: submarine cable
related: coaxial cable
related: telephone exchange
related: telephone network
scope note: line (telephone)

telephone equipment
type: Concept
narrower: telephone line
preferred label: تجهیزات تلفن @fa

subscriber loop
type: Concept
broader: telephone line
preferred label: گره مشترک @fa

telephone network
type: Concept
preferred label: شبکه تلفن @fa
related: telephone line

submarine cable
type: Concept
preferred label: بافه زیردریا @fa
related: telephone line

comparators (circuit)
type: Concept
preferred label: مقایسه‌کننده (مدار) @fa
related: telephone line

telecommunication transmission line
type: Concept
narrower: telephone line
preferred label: خط انتقال مخابراتی @fa

coaxial cable
type: Concept
preferred label: بافه هم‌محور @fa
related: telephone line