Black Box LRA001A-R2 User Manual page 97

Issue the following command from the local Router:
ping ip_address of remote_Router
The response is:
Target did not respond
This occurs because the amount of time to required to establish the connection is longer than the
timeout of the ping command. After issuing the ping command, you should hear the modem dial and
connect with the modem at the remote site. If you hear the modem dial, skip to Approach 2, otherwise
continue immediately below.
1. Verify that the phone cable is attached to the appropriate modem interface on the local Router.
2. Check the routing table on the local Router using the route command. The routing table should
contain an entry with the Destination field specified as the (sub)network on which the remote
Router resides. Make sure that the Bits field in the routing table entry matches the number of
significant contiguous bits to be used as a subnet mask for the remote site.
Make sure that the Interface field in the routing table is specified as modemX, where X is the
appropriate modem designation number. Make sure that the phone cable is connected to the
modem port, shown in the Interface field of the route entry.
3. Issue the dialup status command. Verify that the correct phone number for the remote site is
displayed. To determine if the dialer is configured as required, refer to Section 2.9, dialup, in the
Reference Manual, which begins on page 137, for a description of possible dialer modes: demand,
demand backoff, inactive, incoming, once, or keepup.
Determine the connection status: idle, dialing, listening, serving call, called out. For possible modem
states, refer also to Section B.5 in the Reference Manual, which begins on page 137.
4. To display PPP information, issue the ppp modemX command, where X is the appropriate modem
designation number. Determine if any PPP packets have been sent on the link.
5. Issue the asystat command to see transmit and receive statistics for the appropriate modem
interface. Also, refer to Section 2.3, asystat, in the Reference Manual, which begins on page 137.
6. Issue the tip command to use the appropriate modem interface manually. Refer to Section B.4.1 in
the Reference Manual.
7. If you have taken the steps above and are still unable to determine why the modem is not dialing,
call Technical Support.
Approach 2
If in Approach 1 above, you heard the modem dial, wait approximately 45 to 60 seconds and try the ping
command again.
If the ping command displays a round-trip time, this implies that you are able to make a dialup
connection between the local and remote Routers but the communication between the local and remote
nodes is failing. To determine the reason for the failure, skip to Approach 3.
If you are unable to establish a dialup connection between the local and remote Routers, continue
with the procedures immediately below.
1. Try the ping command again, listening carefully to the modem as it dials. If you hear a busy signal
when the other end connects, try dialing the phone number of the remote site by hand using a
standard telephone. If you receive a busy signal, there is a problem at the remote site that must be
addressed.
ASYNC ROUTER AR-P, AR-5, AND SYNC ROUTER USER'S MANUAL
97