2 Description
2-12
NetPath 100 User’s Manual - Installation Guide
980-001-0210K
November
2000
Modem &
Call Director
The integral on-board modem can be switched to any one of the interfaces of the Net-
Path 100 by the call director. The call director connects the modem to the Base module,
Optional ISDN Adapter module, AUX 1 Port, or AUX 2 Port.
In this way, the modem is used for out-of-band trap reporting (NetPath 100 Base mod-
ule, Option module or DTE device connected to an AUX Port) and accepts incoming
calls for management access of the NetPath 100, DTE device or any other device con-
nected to an AUX Port.
Figure 2-9 shows a block diagram of the Modem and Call Director.
Figure 2-9 Modem & Call Director Block Diagram
On incoming calls, the modem-to-interface assignment is made based on the DTMF
code detected after the NetPath 100 line interface goes off-hook and returns a second
Dial Tone.
DTMF code selections are shown in Table 1.
Modem parameters may be modified in the database as part of the configuration.
The configuration also includes a periodic self-test option for the modem and a dial
tone test for the dial line (performed every four hours), with results indicated on the
status screen, and failures reported as a Trap on the dedicated facility.
Line
interface
C all D irector
D ial
T one G en
M odem
D T M F D et
D ial
Line
B ase
O ption
A ux 1
A ux 2
Table 2-1. Call Director DTMF Codes
Interface
DTMF Code
Base module (CSU)
1
Aux 1 Port
2
Aux 2 Port
3
Option Adapter Module
4
Defaults to Base
module after timeout.
All Others
