3Com Version 4.3 Table of Contents

Table of Contents

PartI. Introduction to 3Com VCX IP Telecommuting Module ............................................................................. i

1.Introduction to 3Com VCX IP Telecommuting Module .................................................................................1

2.Installing 3Com VCX IP Telecommuting Module.......................................................................................... 5

3.Conﬁguring 3Com VCX IP Telecommuting Module ...................................................................................13

PartII. How To..........................................................................................................................................................20

4.How To Conﬁgure SIP...................................................................................................................................21

PartIII. Description of 3Com VCX IP Telecommuting Module Settings............................................................35

5.The Serial Console ........................................................................................................................................ 36

6.Basic Conﬁguration .......................................................................................................................................42

7.Network Conﬁguration ..................................................................................................................................60

8.SIP Services ...................................................................................................................................................69

9.SIP Trafﬁc...................................................................................................................................................... 82

10.Administration .............................................................................................................................................87

11.Logging ........................................................................................................................................................98

12.Failover ......................................................................................................................................................112

13.Tools ..........................................................................................................................................................118

14.Firewall and Client Conﬁguration .............................................................................................................121

PartIV. Appendices ................................................................................................................................................124

A.More About SIP ..........................................................................................................................................125

B.Troubleshooting ..........................................................................................................................................127

C.Lists of Reserved Ports, ICMP Types and Codes, and Internet Protocols ..................................................130

D.Deﬁnitions of terms ....................................................................................................................................140

E.License Conditions ......................................................................................................................................147

F.Obtaining Support for Your 3Com Products ...............................................................................................162

Index.........................................................................................................................................................................165