English to Czech Tech/Engineering Telecom(munications)

Kontext: "The availability guarantees set forth herein shall not apply to local tails nor Global Extension components unless the "Quality Guarantee" section of the relevant Service Order Form indicates that local tails or Global Extension component are covered by the quality guarantee."

Kontext 2: "The XXX SDH service provides point-to-point connectivity with dedicated capacity on a transmission path between two customer locations. Circuit transmission speeds range from E1 to STM-16 interfaces (2Mbps to 2.5Gbps) with a range of service options detailed below. The Service may include local access tails, provided either by selected local tail providers or over XXX's Metropolitan Area networks, where applicable.
The Service may also include a Global Extension component, provided by selected partner operators."

Jedna se o prilohy ke smlouve o telekomunikacnich sluzbach - zapojeni, dostupnost, poruchy, atd.

U terminu "local tails" me napada termin "mistni pripojky", protoze jsem z textu dosel k zaveru, ze se jedna o koncovou cast celeho pripojeni k siti, ktera se nachazi na pozemku zakaznika.

Na druhou stranu u terminu "Global Extension", pripadne "Global Extension component" si nejsem vubec jisty. Doslovny preklad "globalni rozsireni" mi v tomto pripade nic nerika a blizsi vysvetleni jsem v textu nenasel. Take jsem premyslel nad tim, ze extension muze byt i pripojka ci klapka u telefonu, ale ve spojeni se slovem Global mi to nesedi.

Jak vidite, ceske terminy, ktere by tato spojeni vysvetlovaly, me napadaji, ale zkousim najit ten spravny IT vyraz. Napada vas neco?