ZyXEL Communications 128L User Manual
2 Introduction
ISDN Digital Subscriber Line (IDSL)
IDSL uses the 2B1Q line coding standard for ISDN BRI circuits. Used
for data-only applications, IDSL can use unshielded twisted pair wire
for transmitting data at 64/128Kbps for up to 18,000 feet.
for data-only applications, IDSL can use unshielded twisted pair wire
for transmitting data at 64/128Kbps for up to 18,000 feet.
The differences between IDSL and ISDN are:
1. ISDN passes through the phone company's central office voice
network; IDSL bypasses it by plugging into a special router at the
phone company end. Or a pair of Prestige 128L’s can be
connected by a single twisted pair cable.
phone company end. Or a pair of Prestige 128L’s can be
connected by a single twisted pair cable.
2. ISDN requires call setup; IDSL is a dedicated service.
Multiple Networking Protocol Support
The Prestige 128L is a multi-protocol router. It supports TCP/IP,
Novell IPX and Transparent Bridging.
Novell IPX and Transparent Bridging.
Full Network Management
The Prestige 128L incorporates SNMP (Simple Network Management
Protocol) support and menu-driven network management via an RS-
232 or Telnet connection.
Protocol) support and menu-driven network management via an RS-
232 or Telnet connection.
PPP Security
The Prestige 128L supports PAP (Password Authentication Protocol)
and CHAP (Challenge Handshake Authentication Protocol).
and CHAP (Challenge Handshake Authentication Protocol).
Dynamic Host Configuration Protocol (DHCP)
DHCP allows you to dynamically and automatically assign IP address
settings to hosts on your network.
settings to hosts on your network.