virtual access GW-4000 Series, GW-5000 Series User Manual

Service Managed Gateway

Configuring the Analog
Modem

User Guide

Issue 1.2

Date 27 January 2004

Configuring the Analog Modem Table of Contents

© Virtual Access Ltd.

1.0 Introduction ..................................................................................................... 3

2.0 Setting up and Configuring the Analog Modem........................................... 5

2.1 Setting up the physical port connection.................................................... 5

2.1.1 The physical port connection for the GW4000 Series................................. 5

2.1.2 The physical port connection for the GW5000 Series................................. 5

2.2 Configuring the analog modem .................................................................. 5

2.3 Using the modem as the primary WAN interface ..................................... 6

2.3.1 Enabling the modem interface.................................................................... 6

2.3.2 Setting up the PPP WAN interface ............................................................. 6

2.3.3 Setting up PPP- and IP-related interfaces .................................................. 6

2.3.4 Setting up Modem Call-related options....................................................... 6

2.3.5 Setting up Routing ...................................................................................... 7

2.4 Using the modem as a backup WAN interface .......................................... 7

2.5 Using the modem as a management interface .......................................... 7

2.5.1 Setting up the analog modem for dial-out management ............................. 8

2.5.2 Setting up the analog modem for dial-in management ............................... 8

2.6 SMG Boot-Mode Maintenance over V.92.................................................... 8

3.0 Modem Monitoring and Diagnostics ........................................................... 10

3.1 Active Data Connections ........................................................................... 10

3.2 Call History ................................................................................................. 11

3.3 Connection Monitor ................................................................................... 12

3.4 Modem Events............................................................................................ 13

Configuring the Analog Modem Introduction

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1.0 Introduction

The Virtual Access Service Managed Gateway (SMG) GW-4000 and GW-5000
product range is optionally fitted with an analog modem. This document
describes the configuration and use of the analog modem.

The modem conforms to ITU V.92 specification, which is an enhancement of
the V.90 modem. The V.92 modem offers two main functions over the V.90
modem:

1. Quick connect: the connection time may be reduced by 50% compared
to the V.90 modem

2. Faster upstream rate: upload speeds may reach 48kbps, compared to

31.2kbps with the V.90 modem. It is also capable of data speeds of up to
56kbps downstream.

The following standards are supported:

Data modem

V.92 / V.90

V.34

V.32bis

V.32

V.29

V.22bis

V.22

V.22 Fast Connect

V.23

V.21

Bell212a

Bell103

Data compression

V.44

V.42bis and MNP5

V.42 LAPM and MNP2-4 error correction

Configuring the Analog Modem Introduction

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The analog modem interface on SMG products is available for use in several
scenarios.

 As a normal WAN interface, the analog modem can be used in the same

way other WAN interfaces such as DSL and ISDN are used

 As a backup WAN interface, the analog modem can be set up to come

into operation if the primary WAN interface becomes unusable for some
reason.

 As an out-of-band management interface, the analog modem can access

the SMG management functions by dialing into the SMG, for example
using the Virtual Access Activator product. It is also possible for the
SMG to dial-out via the analog modem interface under some conditions.

A number of low-level maintenance functions are available by dialing the SMG
analog modem interface if the SMG does not boot up correctly, or otherwise
fails to start up properly.

Configuring the Analog Modem Setting up and Configuring the Analog Modem

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2.0 Setting up and Configuring the Analog Modem

2.1 Setting up the physical port connection

To set up the physical modem interface, connect your analog line cable to your
phone line wall-socket on one side and to the SMG RJ-11 modem port on the
other side.

2.1.1 The physical port connection for the GW4000 Series

2.1.2 The physical port connection for the GW5000 Series

2.2 Configuring the analog modem

The modem is configured as a logical interface modem-n, where n is the
interface number (for example, modem-0).

The modem interface has the following configuration attributes:

Enabled: Yes, No

The logical modem interface is then connected to a PPP interface through
configuration of the PPP WAN interface as described in section 2.3.2 below.