Nortel Networks BCM50 2.0 Dialup, WAN , Protocols

Chapter 2 Overview of BCM50 Administration 29

BCM50 Administration Guide

A network administrator can connect to and manage a BCM50 via an IP over LAN interface. If the

administrator is accessing the BCM50 system from an external network, then a connectivity path

would need to be provided from the corporate LAN network to the customer's WAN network or to

the customer's ISP provider over another device such as a router elsewhere on the customer's

premises.

Dialup

The modem supports callback for management user access to the BCM50. It can be used to

support auto-dialout on SNMP traps, as well as automated sending of Call Detail Records (CDR)

to a remote CDR collection point.

Due to modest dialup speeds, the administrator will find that the Element Manager panels take

longer to load than if the Element Manager is directly connected through the OAM port or over a

high bandwidth connection.

Configuration backups can be less than 1 Mbyte in size, however if voicemail greetings and

messages are included they could grow considerably larger. If the performance being realized over

the modem does not meet expectations, the administrator may choose to run backups to the local

hard drive or a USB memory device.

For more information on modem configuration see the BCM50 Networking Configuration Guide

(NN40020-603).

A Wide Area Network (WAN) is a communications network that covers a wide geographic area,

such as state or country. A WAN usually consists of two or more local-area networks (LANs).

Computers connected to a wide-area network are often connected through public networks, such as

the telephone system, or can be connected through private leased lines.

You can remotely manage the BCM50 using ISDN BRI. Dial-over-ISDN is supported for any type

of BRI/PRI Media Bay Module (MBM) in an expansion chassis, and is also supported on the main

unit for the BCM50b-series models. On the BCM50b-series only, RJ-45 ports provide connectivity

for BRI trunks from the PSTN.

Several protocols are used in the day to day management of a network of BCM50s. These include:

• SNMP (simple network management protocol): Simple Network Management Protocol is the

Internet standard protocol for network management software. It monitors devices on the

network, and gathers device performance data for management information (data)bases

(“MIB”).

• HTTPS: A secure version of HTTP implemented using the secure sockets layer, SSL,

transmitting your communications in an encrypted form. HTTPS is used between the Element

Manager and the BCM.