Index_U

U

UBR (Unspecified Bit Rate), 91, 98

UDP (User Datagram Protocol), 653

UMTS (Universal Mobile Telecommunications System), 653

UMTS Terrestrial Radio Access Network (UTRAN), 652

UNI (User-to-Network Interface) DCE, 89

uninterruptible power supplies (UPSs), 652

unit numbers for Frame Relay, 73

units, 652

Universal Mobile Telecommunications System (UMTS), 653

unnumbered interfaces, 124–125, 125

configuring, 125–126

verifying, 126

Unspecified Bit Rate (UBR), 91, 98

Update messages, 653

Update timers, 653

upgrades, software, 30–32

UPSs (uninterruptible power supplies), 652

upto match type, 653

user accounts, 10–14, 12, 14, 45–48

User Datagram Protocol (UDP), 653

User-to-Network Interface (UNI) DCE, 89

UTC time zone, 27

UTRAN (UMTS Terrestrial Radio Access Network), 652