User guide
Table Of Contents
- Title Page
- About
- Contents
- Introduction
- Installing the AR100 Series Internet Router
- Getting Connected
- About Web Access to the AR100
- Configuring for the First Time
- Configuring for a Leased Line
- Changing Your Configuration
- Using Telephony Services
- Accessing Router Utilities
- Troubleshooting
- Safety and Statutory Information
10-20 Advanced ISDN troubleshooting
calls, or that it has a software or hardware fault that has put it in a state
whereby it is capable of maintaining a LAPD connection to the switch, but
can't actually responding to call setup requests.
Contact your ISP or the network administrator at your remote office, de-
pending on where the call was made to.
■
21 - Call rejected
This code almost always indicates a mistake in router configuration, either
at your end or at the other end of the connection. This cause code occurs
when the call setup packet is successfully delivered to the router at the other
end of the connection, but the router refuses the call because it is not config-
ured to accept the call. There can be are a number of configuration errors
that can result in a call being refused.
Contact your ISP or the network administrator at your the remote office,
depending on where the call was made to.
The following are some of the more common configuration errors to look
out for.
■
No ISDN call definitions have yet been created on the receiving router.
■
The ISDN call definitions configured on the receiving router are set up
to search for particular strings in the subaddress, CLI or user-user fields
in the call setup packet, but the sending router is not putting the correct
strings into the correct fields.
■
There is an ISDN call definition on the receiving router that will accept
the incoming call, but there is not yet a layer 2 interface (PPP or Frame
Relay) configured to use this call definition.
■
There is an ISDN call definition on the receiving router that will accept
the incoming call, and there is a layer 2 interface configured over the call
definition, but this particular call definition is already taken by another
incoming call.
■
27 - Destination out of order
You are calling a valid number, but the switch does not have a valid LAPD
connection on the channel corresponding to the number you are calling.
This may mean that the device at the other end has not be properly installed
yet, or is switched off. Or it may indicate a fault in the wiring between the
switch and the site where that call is terminated. Contact your ISP or the
network administrator at the remote office, depending on where the call
was made to.
■
34, 38, 44, 42 - ISDN network congestion or fault
If you receive these cause codes regularly, contact your ISDN service pro-
vider.