Prestige 153/153X WAN Bridge/Routers
5-12
Chapter 5
Remote Node Configuration for LAN-to-LAN
5.2 Leased Line Connection
The Leased Line Connection feature allows you to connect a WAN Port or several WAN Ports to
a CSU/DSU (Sync.) or Leased Line Modems (Async). Your Prestige uses the Multilink Protocol
(MP) to bundle WAN ports into a single connection. The Connection Type of these WAN ports
must be selected as [Leased] in Menu 2.
Note on Sync. Device Connection
Connecting a WAN port to a Sync. device such as a CSU/DSU is available only on model
Prestige 153X. WAN port 1 and 2 on Prestige 153X support both Sync. and Async. Devices for
leased line connections. (See Section 2.8 WAN Setup)
Note on PPP Echo Request/Reply
In a Leased Line Connection, a [PPP Echo Request] packet is sent periodically to every link
(WAN Port). This is to verify if the link is up. When your Prestige receives a [PPP Echo Request]
packet, it will send another [PPP Echo Reply] packet back to the sender through the same link.
When [PPP Echo Reply] packets are not received for several times, your Prestige will drop the
link.
Note on Backup Function for Leased Line
You can also enable a Backup function for a Leased Line connection. When all the links in a
Leased Line Connection drop, your Prestige will pick up any available [Switch] WAN port in the
selected Device Type to place a phone call to establish a Backup connection. When any link
(WAN port) in the Leased Line Connection becomes available again, your Prestige will drop the
backup connection. The Backup function is usually enabled in a Leased Line Connection for
LAN-to-LAN applications.
5.2.1 Leased Line Remote Node Profile
From Submenu 11.1.2, select [Leased] in the Connection Type field to go to Submenu 11.1.2 -
Remote Node Profile for Leased Line application, as shown in Figure 5-4.
