User manual
Table Of Contents
- Table of Contents
- About This Guide
- Introduction
- ISDN LAN Modem Functionality Description
- Hardware Description and Installation
- Setting Up TCP/IP for Windows and Macintosh
- Configuring the ISDN LAN Modem
- Advanced Configuration
- Before you Begin
- Setting Up Additional Service Providers
- Editing Service Provider Profiles
- Restricting Workstations from Accessing Service Provider(s)
- Configuring Your LAN Parameters
- Changing Data Call Parameters
- Changing Voice Call Routing
- Reserving DHCP Addresses
- Selective Password Protection
- Changing Your Password
- Setting Up Your ISDN Line Manually
- Locking and Unlocking the Configuration
- Configuring the ISDN LAN Modem from a Remote Location
- Supplementary Voice Call Services
- Placing, Receiving and Disconnecting Calls
- Troubleshooting and Maintenance
- Networking Primer
- What is a network?
- What is a LAN?
- What is a WAN?
- How does a LAN connect to a WAN?
- What is a LAN modem?
- What is ISDN?
- How do different devices communicate with each other?
- What is TCP/IP?
- What is an IP Address?
- What is a Subnet Mask?
- Dynamic and Static IP Addresses
- What is DHCP?
- What is DNS?
- What is NAT?
- What are numbered and unnumbered links?
- How is overall throughput determined?
- What is a network?
- Using the Custom Web Browser
- ISDN LAN Modem Factory Defaults
- ISDN LAN Modem Specifications
- Ordering ISDN Service
- If You Place Your ISDN Order Through 3Com
- If You Place Your ISDN Order Through the Telephone Company
- Supplementary Voice Features Included with U, EZ-ISDN-1, V and EZ-ISDN 1A
- Limitations of ISDN Ordering Codes U, EZ-ISDN 1, V and EZ-ISDN 1A
- What If I Already Have ISDN Service?
- Table of ISDN Ordering Code Capabilities
- Glossary
- Index
- 3Com Corporation Limited Warranty
Disconnecting Data Calls 89
Disconnecting Calls
Automatically Using
Timers
There are a number of ways by which you can configure calls to be disconnected
automatically. You can set timers and disconnect thresholds from the Data Call
Parameters window. Specifically, the parameters you can set are as follows.
Minimum Call Duration
Enter the minimum length of a call that is measured before the ISDN LAN Modem
detects inactivity on the connection and then starts an inactivity timer. The default
is 2 minutes.
Idle Timeout
In the field
Disconnect a data call after how long of an inactivity period?
, enter the
number of seconds after which a call should be disconnected because of inactivity.
Once the minimum call duration is satisfied and then no activity is detected for a
call, this timer is started. To prevent a data call from being disconnected because
of inactivity, enter 0. The default for an automatic call is 30 seconds. The default
for a manual call is 15 minutes.
Bandwidth on Demand
Parameters
You can specify when you want a second B channel to be added automatically
based on the utilization of the first B channel.
Connect/Disconnect threshold for the second B channel
If you specified that you want to use the second B channel only when needed,
indicate the percentage of bandwidth on the first B channel which must be
reached before the second B channel is allocated. By default the threshold is 60%.
Connect Delay
This field defines the length of time the ISDN LAN Modem should wait before
adding the second B channel. By default the length of time is 10 seconds.
Therefore, this default, in combination with the Connect/Disconnect Threshold
default means that after a B channel reaches over 60% throughput for
10 seconds, a second B channel is added, if not already in use.
Disconnect Delay
This field defines the length of time the ISDN LAN Modem should wait before
removing the second B channel. By default the length of time is 20 seconds.
Therefore, this default, in combination with the Connect/Disconnect Threshold
default means that if throughput falls below 60% for 20 seconds, a B channel is
removed.