alling ▁System ▁ 1 ▁( DA SS 1 ) ▁is ▁a ▁propriet ary ▁protocol ▁defined ▁by ▁British ▁Tele com ▁to ▁provide ▁I SD N ▁services ▁in ▁the ▁United ▁Kingdom . ▁It ▁is ▁now ▁ob sole te , ▁having ▁been ▁replaced ▁by ▁DA SS 2 . ▁This ▁too ▁will ▁become ▁ob sole te ▁over ▁the ▁coming ▁years ▁as ▁Q . 9 3 1 , ▁a ▁European ▁standard , ▁becomes ▁widely ▁adopted ▁in ▁the ▁EU . ▁ ▁Category : B T ▁Group ▁Category : Integr ated ▁Services ▁Digital ▁Network <0x0A> </s> ▁Burg ä sch ise e ▁is ▁a ▁lake ▁near ▁A esch i ▁in ▁Switzerland , ▁on ▁the ▁border ▁of ▁the ▁cant ons ▁of ▁Ber ne ▁and ▁Sol oth urn . ▁The ▁lake ▁has ▁a ▁surface ▁of ▁ 2 1 ▁ha ▁and ▁a ▁maximum ▁depth ▁of ▁ 3 6 ▁m . ▁ ▁In ▁ 1 9 4 1 ▁and ▁ 1 9 4 3 , ▁the ▁water level ▁was ▁lower ed ▁by ▁ 2 ▁m . ▁The ▁current ▁surface ▁elev ation ▁is ▁ 4 6 5 ▁m . ▁ ▁External ▁links ▁Burg ä sch ise e ▁ ▁Tour ist ▁information ▁ ▁Category : L akes ▁of ▁Switzerland ▁Category : L akes ▁of ▁the ▁canton ▁of ▁Bern ▁Category : L akes ▁of ▁the ▁canton ▁of ▁Sol oth urn ▁L B urg as ch ise e <0x0A> </s> ▁In ▁In uit ▁myth ology , ▁N er riv ik ▁was ▁the ▁sea - m other ▁and ▁provider ▁of ▁food ▁for ▁the ▁In uit ▁people . ▁ ▁She ▁was