ZyXEL Communications ISDN Terminal Adapter Omni.Net Lite - Manual (Page 31)

Omni.Net Lite User’s Guide
Chapter 2 Using the Utility 30
2.4.4 ISDN Protocols
HDLC (High-Level Data Link Control) is one of the most common data link (layer 2)
protocols. It supports both half duplex and full duplex communication lines, point to point
(peer to peer) and multi-point networks, and switched or non-switched channels. It permits
synchronous, code-transparent data transmission.
The TA supports the following protocols.
2.4.5 Configuring Local DN and Call Type
Click Local DN and Call Type under RS-232 Port to open the screen as shown next.
Table 4 ISDN B-channel Protocols
ISDN
PROTOCOLS
DESCRIPTION
V.110 V.110 is most popular in Japan or Europe.
V.120 V.120 is most commonly used in North America.
X.75 X.75 was originally designed for packet-switched signaling systems in public
networks to provide data transmission services. However, it is now also used as
the link layer for telematic services (as defined in T.90) in ISDN. These services
include both ISDN circuit-switched mode (DTE-DTE communication) and ISDN
packet-switched mode (DTE-DCE communication). DCE (Data Communication
Equipment) is a device, such as a modem, that converts data between different
interfaces (digital and analog for example) and exchanges data with the DTE.
PPP and MLP PPP allows B-channels bundling and bandwidth release and is the most widely
used protocol for Internet access.