Yealink SIP-T54S, Administrator'S Manual

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Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
1012
Time Zone Time Zone Name
+5
Kazakhstan(Aqtobe), Kyrgyzstan(Bishkek), Pakistan(Islamabad),
Russia(Chelyabinsk)
+5:30 India(Calcutta)
+5:45 Nepal(Katmandu)
+6 Kazakhstan(Astana, Almaty), Russia(Novosibirsk,Omsk)
+6:30 Myanmar(Naypyitaw)
+7 Russia(Krasnoyarsk), Thailand(Bangkok)
+8
Australia(Perth), China(Beijing), Russia(Irkutsk, Ulan-Ude),
Singapore(Singapore)
+8:45 Eucla
+9 Japan(Tokyo), Korea(Seoul), Russia(Yakutsk,Chita)
+9:30 Australia(Adelaide), Australia(Darwin)
+10
Australia(Brisbane), Australia(Hobart),
Australia(Sydney,Melboume,Canberra), Russia(Vladivostok)
+10:30 Australia(Lord Howe Islands)
+11 New Caledonia(Noumea), Russia(Srednekolymsk Time)
+11:30 Norfolk Island
+12 New Zealand(Wellington,Auckland), Russia(Kamchatka Time)
+12:45 New Zealand(Chatham Islands)
+13 Tonga(Nukualofa)
+13:30 Chatham Islands
+14 Kiribati
Appendix C: Trusted Certificates
Yealink IP phones trust the following CAs by default:

DigiCert High Assurance EV Root CA

Deutsche Telekom AG Root CA-2

Equifax Secure Certificate Authority

Equifax Secure eBusiness CA-1

Equifax Secure Global eBusiness CA-1

GeoTrust Global CA

GeoTrust Global CA2

GeoTrust Primary CA

GeoTrust Primary CA G2 ECC

GeoTrust Universal CA

GeoTrust Universal CA2

Thawte Personal Freemail CA

Thawte Premium Server CA