Chapter 4 Remote Node Configuration; Remote Node Setup; Minimum Toll Period - ZyXEL Communications Prestige 202 User Manual

Prestige 202 ISDN Router
Chapter 4
Remote Node Configuration
This chapter covers the parameters that are protocol independent. The protocol-dependent
configuration (TCP/IP) is covered in the next chapter.
A remote node is required for placing calls to a remote gateway. A remote node represents both the
remote gateway and the network behind it across a WAN connection. Note that when you use
Menu 4 to set up Internet access, you are actually configuring one of the remote nodes. Once a
remote node is configured correctly, traffic to the remote network will trigger your Prestige to
make a call automatically, i.e., Dial On Demand.
In this chapter, we will discuss the parameters that are protocol independent. The protocol-
dependent configuration (TCP/IP) will be covered in Chapter 5.
4.1

Remote Node Setup

This section describes the protocol-independent parameters for a remote node.

4.1.1 Minimum Toll Period

Phone calls are normally charged per basic time unit with the time being rounded up to the nearest
unit when bills are calculated. For example, the Prestige may make a call but drop the call after 10
seconds (maybe there was no reply) but the call would still be charged at a minimum time unit, let
us say 3 minutes. With minimum toll period, the Prestige will try to use all the toll period. In the
above case, the Prestige tries to extend the idle timeout to the nearest 3 minutes (basic charging
unit of time). If there is traffic during the extended 2 minutes and 50 seconds, the idle timeout will
be cleared and a second call is eliminated. Since the session time calculation by the Prestige is not
always perfectly synchronized with your telephone company, the Prestige drops the channel 5
seconds before the toll period you set, to compensate for any lag. As such, you must not set the
minimum toll period to less than 5 seconds.
4-1
Remote Node Configuration