Cisco dialout utility download

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The same Access Server can be used for dialin as well as dialout application. Ensure you can connect to the modem by issuing an AT command which should return an OK response. If you can connect to the modem, try to dial the number of the remote device using the atdt command.

If the connection is successful, then the router configuration is correct and the hardware is working correctly. Check the following:. If you cannot ping the router interface troubleshoot your LAN for routing related issues. If the reverse Telnet succeeds in reaching the modem AT command mode, but the manual call fails, then the problem could be a Telco or remote router issue.

Troubleshoot the remote router, the line and retest the connection before proceeding further. If you can reach the modem and dialout, then there is nothing wrong with the LAN we had previously verified that dialout from the NAS is working. This failure is caused by application settings and is characterized by an inability to enter the password, thus login fails.

To correct the Telnet application setting for this session, follow the procedure below on the host PC:. To watch the initial success of a non-DDR callout for example, a Configuring Reverse Telnet callout , use the debug telnet command to see the incoming telnet connection to the router.

If the TCP connection is being refused, there is either no listener at the specified address and port or someone is already connected to that port. Verify the address to which you are connecting, and verify the port number.

Also, ensure the modem inout or modem dtr-active and the transport input all commands appear under the line configuration for the line being reached. If using the rotary function, ensure the rotary 1 or whatever number you chose command also appears in the line configuration. To see whether someone is connected, telnet to the router and use the show line command. Look for an asterisk to indicate that the line is in use. Use the clear line n command to disconnect the current session on that port number.

At this point, the telnet should be working. Next, identify the type of media that is being used for the outbound connection:. To identify an external async modem non-DDR callout for example, Configuring Reverse Telnet callout , perform the following:. Enter the AT command, and ensure that an OK response appears. Enter the AT command again to see whether the OK response appears. If the OK response appears, the modem may need to be initialized.

If you still do not get an OK response, verify the cabling, line speed, and parity settings on the local async modem to the router connection. For further reference, see the Modem-Router Connection Guide. Swap the originating modem's cables and try again.

If it still is not working, try a handset on the line. Be sure to use the same cable that the modem was using. If the handset is not able to make an outbound call even with the new cable, contact the telco to check the originating phone line. If the modem seems to be placing the calls as expected, ensure that the called phone number is correct. Use a handset to call the receiving number.

If a manual call is able to reach the receiving number, listen for the remote modem to offer answerback tone ABT. If the call goes unanswered or no ABT is heard, the receiving modem may not be set to autoanswer. The receiving modem may need to be initialized or debugged. If the receiving modem is attached to a Cisco router, refer to the Modem-Router Connection Guide for further details.

Verify the modem, and replace as needed. If a manual call is not able to reach the answering async modem, change the phone cables on the receiving modem and try a regular phone on the receiving modem's line. If the call can be received by the regular phone, there is likely a problem with the receiving modem. If the manual call is still not able to reach the regular phone on the line in question, try another known good line in the receiving facility.

If that connects, have the telco check the phone line going to the receiving modem. If the manual call is not able to reach the receiving facility and this is a long-distance call, have the originating side try another known good long-distance number. If that works, the receiving facility or line may not be provisioned to receive long-distance calls.

If the originating line cannot reach any other long-distance numbers, it may not have long distance enabled. Try codes for different long distance companies. If the async modems do not train up, manually call the number and listen for static. There may be other factors interfering with train up.

There may be a cable problem between the receiving modem and the DTE to which it is attached. Trainup failures are likely a circuit or incompatibility problem. Some of this can be remedied by detuning the modems, which limits them to less "aggressive" speeds.

As an example of the technique, llet's try a connection to one of Cisco's test systems. First, we'll want to enable the speaker and DCE rate information reporting:. The normal connection seems to be failing. Ensure that data is flowing. Press the Return key a few times to see whether data is flowing back and forth from the remote system to the local session. If data is not flowing, there may be a cable or signal problem when the remote async modem tries to communicate with the remote DTE.

Debug and replace as needed. If entering data gets a reasonable response from the other side, the modem connection is working. Warning: Running debugs on a busy system could crash the router by overloading the CPU or over-running the console buffer. Software Release In prior versions of IOS, the command service internal would have to be entered into the main level of the router's configuration and modem-mgmt csm debug-rbs would need to be entered at the exec prompt. Use modem-mgmt csm no-debug-rbs to turn off the debug.

If you still do not get an OK response, there may be a problem with the modem module. Before a call can be placed, a modem must be allocated for the call. To view this process and the subsequent call, use the debug output to determine whether this is happening. For example:. Debugging this information on an AS requires connecting to the trunk card. Getting to this point in the debugging indicates that the calling and answering modems have trained and connected. If a modem is properly allocated for the outbound call but the connection fails to get this far, the T1 must be examined.

See Troubleshooting Serial Lines for an explantion of show controller output. If this is a long distance call, have the originating side try another known good long-distance number. If the originating CAS line cannot reach any other long-distance numbers, it may not have long distance enabled.

As an example of the technique, let's try a connection to one of Cisco's test systems. Debug, and replace as needed. Warning: Running debugs on a busy system could crash the router by overloading the CPU or over-running the console buffer!

If the OK response appears, the modem may need to use a modemcap to be initialized. This involves using the command modem autoconfigure type xxx , where xxx is the modem type. Verify that the modem can place a call by manually initiating a dial. If no call gets out, there may be an ISDN problem. For outbound ISDN calls, debug isdn q and debug isdn events are the best tools to use. Fortunately, debugging outbound calls is very similar to debugging incoming calls.

A normal successful call might look like this:. This can help you to localize the problem. The third and fourth bytes indicate the actual reason for the failure. See Table 9 for the meanings of the different values. If the originating BRI line cannot reach any other long-distance numbers, it may not have long distance enabled.

It requires a later hardware revision of the BRI network module. Enter the AT command and ensure that an OK response appears. At this point in the sequence, the modems are connected and trained up.

Now it? If the line receiving the call is configured with autoselect ppp and the async interface is configured with async mode interactive , use the command debug modem to verify the autoselect process.

As traffic comes in over the async link, the access server will examine the traffic to determine whether the traffic is character-based or packet-based.

Depending on the determination, the access server will then either start a PPP session or go no farther than having an exec session on the line. Note 1 : The inbound traffic is displayed in hexadecimal format. This is based on the bits coming in over the line, regardless of whether the bits are ASCII characters or elements of a packet.

The bits represented in this example are correct for an LCP packet. Anything different would be either a malformed packet or character traffic. Note 3 : The async interface changes state to up , and the PPP negotiation not shown commences.

If the call is a PPP session and if async mode dedicated is configured on the async interface, use the command debug ppp negotiation to see whether any configuration request packets are coming from the remote end.

Otherwise, connect from the call-originating end with a character-mode or "exec" session that is, a non-PPP session. Note: If the receiving end displays async modem dedicated under the async interface, an exec dial-in only shows what appears to be random ASCII garbage.

To allow a terminal session and still have PPP capability, use the async interface configuration command async mode interactive. Under the associated line?