Allied Telesis AR400 Series Router - Manual (Page 124)

124 AR400 Series Router User Guide
Software Release 2.6.1
C613-02021-00 REV D
What To Do if ISDN Fails to Connect
Make sure the system territory is set to the country or region in which your
router is located. This is important because different countries use variations
on the ISDN protocols, and the system territory setting on the router ensures
that the router behaviour is compatible with the ISDN network.
SET SYSTEM TERRITORY={AUSTRALIA|CHINA|EUROPE|JAPAN|KOREA|
NEWZEALAND|USA}
Use PING (“Checking Connections Using PING” on page 126) to determine
which link is failing.
■ PING the remote router. If this succeeds, the ISDN network is functioning,
and any difficulties are in a higher layer protocol. If this fails, PING all
intermediate IP interfaces.
■ PING the IP address at the local router’s interface to the Network
Terminator (NT). If this fails, check the IP configuration on your router.
■ PING the Network Terminator (NT) interface to the router at the local
premises. If this fails, check the physical connection between the router and
the NT.
■ PING the Network Terminator (NT) interface to the ISDN network at the
local premises. If this fails, the NT may be faulty.
■ PING the Network Terminator (NT) interface to the ISDN network at the
remote premises, if known. If this succeeds, the ISDN network is
functioning. If this fails, the ISDN network is faulty. Contact your ISDN
service provider, and tell them which interfaces you have succeeded and
failed to PING.
■ PING the Network Terminator (NT) interface to the router at the remote
premises, if known. If this fails, the problem is in the NT at the remote site.
■ PING the Network Terminator (NT) interface to the router at the remote
premises, if known. If this fails, then the problem is in the NT at the remote
premises.
What To Do if the PPP Link Disconnects
Regularly
If the device at the other end of the PPP link is not an ATR router or switch but
is supplied by another vendor turn LQR (Link Quality Reporting) off on PPP
links (LQR=OFF) and instead use LCP Echo Request and Echo Reply messages
to determine link quality (ECHO=ON). Enter the command:
SET PPP=ppp-interface ECHO=ON LQR=OFF