97
STP
Spanning-Tree Protocol
STP, defined in the IEEE 802.1D, is a link management
protocol that provides path redundancy while
preventing undesirable loops in the network. For an
Ethernet network to function properly, only one active
path can exist between two stations.
STU-C
Central Office or CO.
STU-R
Customer Premises Equipment or CPE.
TCI
Tag Control Information
field
TCI includes user priority, Canonical format indicator
(CFI) and VLAN ID.
TCP
Transmission Control
Protocol
TCP is a connection-oriented protocol that is
responsible for reliable communication between two
end processes. The unit of data transferred is called a
stream, which is simply a sequence of bytes.
TC-PAM
Trellis Coded Pulse
Amplitude Modulation
TC-PAM is the modulation format that is used in both
HDSL2 and SHDSL, and provides vigorous
presentation over an assortment of loop circumstances.
SHDSL uses TC-PAM to give a rate/reach adaptive
potential offering improved performance and enhanced
spectral compatibility with ADSL when compared to
today's traditional 2B1Q SDSL offerings.
ToS
Type of Service
The Type of Service (TOS) field in the IPv4 header has
had various purposes over the years, and has been
defined in different ways by five RFCs[note 1] The
modern redefinition of the TOS field is a six-bit
Differentiated Services Code Point (DSCP) field and a
two-bit Explicit Congestion Notification field.
TPID
Tag Protocol Identifier
TPID defined value of 8100 in hex. When a frame has
the EtherType equal to 8100H, this frame carries the
tag IEEE 802.1Q / 802.1P.
TR069
Technical Report 069
TR-069 is a DSL Forum (which was later renamed as
Broadband Forum) technical specification entitled CPE
WAN Management Protocol (CWMP). It defines an
application layer protocol for remote management of
end-user devices.
UBR
Unspecified Bit Rate
UBR (Unspecified Bit Rate) is the simplest service
provided by ATM networks. There is no guarantee of
anything. It is a primary service used for transferring
Internet traffic over the ATM network.
