Filter
Top Products
Chapter 3. Configuring 3Com VCX IP Telecommuting Module
See appendix C, Lists of Reserved Ports, ICMP Types and Codes, and Internet Protocols, for more information on
netmasks.
Name queries in 3Com VCX IP Telecommuting Module
A Telecommuting Module should be as independent of other computers as possible. At the same time, the person
who changes the configuration of the Telecommuting Module may want to use names for the computers instead of
IP addresses. Also, the SIP module needs to look up names of SIP domains. This makes it necessary to use a DNS
(name server) for SIP requests.
There are three instances when 3Com VCX IP Telecommuting Module uses a DNS server:
• When it receives a SIP request for a SIP domain.
The results of these DNS queries are stored for a short while in the Telecommuting Module.
• When you change names/IP addresses and save the page.
The results of these DNS queries are stored in the Telecommuting Module.
• When you click on Look up all IP addresses again.
The results of these DNS queries are stored in the Telecommuting Module.
3Com VCX IP Telecommuting Module is dependent of a working name server for the SIP functions. However, it
doesn’t automatically look up IP addresses in the configuration, which makes it necessary to click on Look up all
IP addresses again every time a computer changes its IP address.
When you enter IP addresses in the Telecommuting Module, they are not updated automatically. If you change a
name/IP address in a row, the row is updated when you click on Save, switch to another page of the Telecommuting
Module user interface, or click on Look up all IP addresses again.
19