Troubleshooting - US Robotics 3CP3468 User Manual

T
ROUBLESHOOTING
Note: Many of the remedies below involve changing the settings of
your ISDN TA using ControlCenter. All of these settings can also be
changed using AT commands and your computer's communications
software. For more information, see the chapter "Configuring Your
ISDN TA Using AT Commands."
When I connect to my Internet Service Provider, the B1 and
B2 lights illuminate on my ISDN TA. However, my connect
speed in Dial-Up Networking only shows 64 Kbps rather
than 128 Kbps.
When in PPP mode, your ISDN TA only reports single B-channel
connect speeds to the operating system. If the B1 and B2 lights are
illuminated, you have a MultiLink connection.
If Dial-Up Networking shows that you are connected at 64 Kbps and
both B1 and B2 lights are illuminated, you are connected at 128 Kbps.
If Dial-Up Networking shows that you are connected at 56 Kbps and
both B1 and B2 lights are illuminated, you are connected at 112 Kbps.
When I download large files, the second B-channel on my
ISDN line is used, and the B2 light on my ISDN TA
illuminates. Most other times, however, only my B1 light
illuminates, and only one B-channel is used. How can I
connect to my Internet Service Provider with two B
channels all the time?
Open the ControlCenter. Then click the Configuration Manager icon.
When the "Basic Configuration" screen appears, click the Outgoing
Calls drop-down menu. Then select Internet Access (PPP) 128 Kbps.
When someone calls my ISDN line with a voice call, one of
my B-channels used for 128 Kbps data transmission is
turned off and the phone connected to my ISDN TA rings.
How do I prevent calls from being accepted while there is a
data transmission on both B-channels?
Open ControlCenter. Then click the Configuration Manager icon.
When the "Basic Configuration" screen appears, click the Dynamic
Voice Override drop-down menu. Select either No Dynamic Voice
Override or Outgoing Calls only.
If you select "No Dynamic Voice Override," a B-channel will never be
taken off the data transmission to make or accept a voice call.
If you select "Outgoing Calls only," a B-channel will be taken off a
data transmission only when you attempt to place a voice call from a
telephone connected to your ISDN TA. When a voice call is made to a
telephone connected to your ISDN TA, the caller will get a busy signal.
During a 128 Kbps connection, anyone dialing one of my
ISDN phone numbers (Directory Numbers) gets a busy