Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Mumunda wefoni, unhu hwebasa hwakatsanangurwa neITU muna 1994. Unhu hwebasa hunosanganisira zvinodikanwa pamativi ose ekubatanidza, zvakadai sokupindura kwebasa nguva, kurasikirwa, chiratidzo-kune-ruzha chiyero, crosstalk, echo, kukanganisa, frequency response, loudness levels, nezvimwe zvakadaro. A subset of telephony QoS is grade of service (GoS) requirements, iyo inosanganisira zvinhu zvekubatanidza zvine chekuita nekugona uye kufukidzwa kwenetiweki, semuenzaniso kuvimbiswa kwakanyanya kuvharika mukana uye mukana wekutadza. Mumunda wemakomputa network uye mamwe mapakeji-akashandurwa materevhizheni enetiweki, teletraffic engineering inoreva traffic kukoshesa uye mashandiro ekuchengetedza mashandiro pane kuita sevhisi. Unhu hwebasa ndiko kukwanisa kugovera kukoshesa kwakasiyana kune zvakasiyana-siyana zvinoshandiswa, vashandisi, kana kudonha kwemashoko, kana kuvimbisa imwe nhanho yekushanda kune kudonha kwemashoko. Semuenzaniso, bit rate inodiwa, kunonoka, kunonoka kusiyanisa, kurasikirwa kwepaketi kana bit zvikanganiso zvinogona kuvimbiswa. Hunhu hwebasa hwakakosha kune chaiyo-nguva yekushambadzira multimedia kunyorera senge izwi pamusoro peIP, mitambo yakawanda yepamhepo uye IPTV, sezvo izvi zvinowanzoda yakatarwa bit rate uye inononoka kunonoka. Unhu hwebasa hunokosha zvikurukuru mumambure umo mano ari chinhu chakaganhurirwa, somuenzaniso mukukurukurirana kwedata kwenhare.  Mubvunzo: chii chinovimbiswa nechikamu chiduku che qos?
bit rate, delay, delay variation, packet loss kana bit error rates zvinogona kuvimbiswa