▁( M DF ) ▁or ▁combined ▁distribution ▁frame ▁( C DF ) ▁to ▁individual ▁c ables ▁connected ▁to ▁equipment ▁in ▁areas ▁remote ▁from ▁these ▁frames . ▁ ▁ID F s ▁are ▁used ▁for ▁tele phone ▁exchange ▁central ▁office , ▁customer - pre m ises ▁equipment , ▁wide ▁area ▁network ▁( W AN ), ▁and ▁local ▁area ▁network ▁( L AN ) ▁environments , ▁among ▁others . ▁ ▁In ▁central ▁office ▁environments ▁the ▁ID F ▁may ▁contain ▁circuit ▁term ination ▁equipment ▁from ▁various ▁auxili ary ▁components . ▁In ▁W AN ▁and ▁L AN ▁environments ▁ID F s ▁can ▁hold ▁devices ▁of ▁different ▁types ▁including ▁backup ▁systems ▁( hard ▁drives ▁or ▁other ▁media ▁as ▁self - cont ained , ▁or ▁as ▁RA ID s , ▁CD - ROM s , ▁etc .), ▁networking ▁( switch es , ▁hub s , ▁rou ters ), ▁and ▁connections ▁( fi ber ▁opt ics , ▁co ax ial , ▁category ▁c ables ) ▁and ▁so ▁on . ▁ ▁References ▁▁▁ ▁Category : T ele phony ▁equipment <0x0A> </s> ▁The ▁family ▁cap ▁den ies ▁moth ers ▁and ▁families ▁who ▁receive ▁w elf are ▁assistance ▁further ▁financial ▁assistance ▁after ▁the ▁birth ▁of ▁another ▁child . ▁ ▁It ▁applies ▁to ▁some ▁of ▁the ▁United ▁States ▁and ▁in ▁some ▁other ▁countries , ▁such ▁as ▁South ▁Korea ▁and ▁Singapore . ▁ ▁United ▁States ▁Trad itionally , ▁each ▁family ▁member ▁is ▁entitled ▁to ▁an ▁all ot ment ▁of ▁w elf are ▁benefits . ▁If ▁a ▁family ▁had ▁a ▁child ▁while ▁receiving ▁w elf are ▁assistance