Westermo ID-90 - Manual (Page 120)

120 6607-2204
TEI
Terminal Endpoint Identifier, a unique identifier associated with each ISDN device in
operation. The TEI is used to differentiate between devices whose control signals are
being multiplexed onto the same D-channel. Some devices request a TEI from the net-
work switch upon being connected, while others request permission to use a specific TEI
assigned when the ISDN subscription was negotiated.
U-Interface
Two wire interface between the subscriber and the telephone company. The most common
transmission technique is Echo Cancellation at 160 kbit/s. The maximum wire length is 6 km.
V110
Support by an ISDN of data terminal equipments with V-Series type interface
Bit rate conversion and control signal handling.
V120
Support by an ISDN of data terminal equipment with V-Series type interface with provi-
sion for statistical multiplexing.
V.17
Modulation standard for facsimile applications with rates up to 14 400 bit/s.
V.21
300 bit/s, similar to Bell 103.
V.22
1 200 bit/s full duplex.
V.22bis
2 400 bit/s full duplex.
V.23
1 200/75 bit/s Split speed line.
V.23hdx
1 200 multidrop lease line standard.
V.32
9 600 bit/s full duplex.
V.32bis
14 400 bit/s full duplex.
V34
A modem operating at data signalling rates of up to 33 600 bit/s.
V.42
CCITT’s error correction protocol incorporating LAPM. If the V.42 connection fails then
MNP will be tried.