Automatic Data Dial-Out Service - Nortel BCM50 Configuration Manual

Chapter 69 Dial Up overview 499
Modem Remote Access Service Specifics
For Modem dial in, the Auto-disable feature will automatically disable the modem if no
connections are established for a configurable period of time. The Auto-disable feature is turned
off by default. The modem can be enabled through Element Manager, using Feature 9*8 or the
Startup Profile. If the modem is enabled using the Startup Profile, the Auto-disable capability is
turned off.
The modem has a Directory Number (DN) associated with it. This DN can be used to redirect a
call to the modem. A call can be redirected to the modem DN using the F70 (Transfer) feature
from any sets attached to the BCM, or it can be redirected to the modem DN using the
Auto-Attendant feature. Any user on the BCM can redirect an active call at their set by using
Feature 9*0 if they don't know the modem DN. Feature 9*0 will also display the modem DN on
any sets with at least 1 line display.
The modem can also be programmed to answer incoming lines directly after a configurable
number of rings. Please be aware that most modems are programmed by default to give up on a
connection after 60 seconds. If the number of rings and the amount of time it takes for the 2
modems to establish a connection take more than 60 seconds, the connection will fail. If an
administrator wants a modem to answer after a longer period than this default timeout, the calling
modem answer timeout should be changed accordingly.
Internal calls to the modem will always be answered immediately. External calls transferred to the
modem will be answered after the number of rings specified on the Modem Dial-In Parameters
tab. This gives enough time to wait and collect caller ID information which will be captured and
logged every time the modem connects.

Automatic Data Dial-Out Service

Automatic Dial-Out Service allows IP communications with a remote server through the modem
or ISDN interface.
The user can configure the BCM system to automatically set up a modem or ISDN connection
with a remote PPP server for establishing a PPP link when it needs to deliver IP data packets.
Many services on the BCM have destination or source addresses which could be resolved by a
route associated with the Auto Dial-Out service. The SNMP Trap delivery service, Log download,
Backup download, CDR records push, Software Updates pulls, and the Keycodes file upload are
just examples of such services. An administrator must be aware that the use of scheduled services
over the modem may not give the expected results as a modem connection could fail for many
different reasons and besides the SNMP v3 trap delivery, those services have no retry capabilities.
The triggering IP data follows a configured IP route to access the PPP interface, which then
activates a dialing script to cause the modem to dial a remote number, starts PPP negotiation,
establishes PPP link, and delivers the data packets.
After a configurable period of inactivity over the PPP link, the modem or ISDN link is
disconnected. Any new IP data packets will then trigger the connection again. Please keep in mind
the long distance charges when configuring the inactivity timeout. Sometimes it is cheaper to keep
a link up a bit longer than to make two calls of shorter periods.
The number to dial has to be a number which can be dialed using a Destination Code (route). The
modem or ISDN link cannot use a Line Pool access code to dial out.
Networking Configuration Guide