Router Port | Examples of where found | Cables Required |
---|---|---|
DB-25 DTE | Male DB-25 AUX on the Cisco 4000, 7000, 7200, and 7500. | Straight-through DB-25F -- DB25M RS-232 cable. |
DB-25 DCE | Female DB-25 console port on the Cisco 4000 and 7000 series. | Null-modem DB-25M -- DB25M RS232 cable. A rolled RJ-45--RJ-45 with CAB-25AS-MMOD adapters on both ends will work. |
DB-60 | Sync/async interfaces. Cisco 1005, 1600s, and 2500s; network modules on the Cisco 2600, 3600, and 4000. | Cisco-specific cable, the CAB-232MT(=). |
RJ-45 | AUX or CON on the Cisco 2500s, 2600, 3600, AS5200, and AS5300. | Rolled RJ-45--RJ-45 cable with adapter marked 'MODEM' (part number CAB-25AS-MMOD). |
68-pin | Cisco 2509-2512; network modules on the Cisco 2600 and 3600. | Cisco parts CAB-OCTAL-ASYNC(=) (with connectors marked 'MODEM') and CAB-OCTAL-MODEM(=). |
'Smart Serial' | WAN interface card (WIC) on 1720 and 2600s. | Cisco part CAB-SS-232MT(=). |
line 'x' | TTY #. AUX port is line 1 on the router, last_tty+1 on the access server, line 65 on the Cisco 2600s and 3620, and line 129 on the Cisco 3640. |
---|---|
speed 'xxxxx' | Set to the highest speed in common between the modem and the port. This value is usually 115200 baud. See the Bitrate Information. |
stopbits 1 | Improve throughput by reducing async framing overhead (default is stopbits 2). |
flowcontrol hardware | RTS/CTS flow control. |
modem inout | Drop connection on loss of DCD (DSR). Cycle DTR for connection close. This command also allows outbound connections to the modem. |
transport input all | telnet | Allow outbound connections to this line. Needed in order to allow reverse Telnet to the modem. |
Maximum Speed | Supporting platforms and interfaces |
---|---|
38400 | Most AUX ports |
115200 | Cisco 1005, 1600, and 2509 through 2512 AUX on Cisco 2600 and 3600 Modules and WICs that support external asynchronous modems (for example, NM-16A, WIC-2A/S) |
Modem Brand | Initialization String | Notes |
---|---|---|
3Com/USRobotics | &F1S0=1 | &F1 factory hardware flow control defaults In addition to the initialization string, 3Com/USR modems require DIP switches to be properly set. Switches 3 and 8 must be down and all the rest must be up. |
AT&T/Paradyne | &FS0=1&C1&D3Q3N7%C1 | |
Best Data Smart One | &FS0=1&C1&D3 | |
Diamond/Supra | &FS0=1 | |
Global Village | &FS0=1&C1&D3Q3J0N3%C1 | |
Hayes Optima | &FS0=1&Q9&C1&D3 | Note: Do not use the built-in hayes_optima modemcap. It sets &Q6, which disables error control. |
Microcom | &FS0=1&C1&D3Q3J0N6%C1 | Note: This information is not intended for use with the internal modems found on the AS5200, Cisco 2600, or Cisco 3600 platforms. This information is intended for Microcom stand-alone modems. |
Motorola ModemSurfr | &FS0=1&C1&D3J | |
Motorola/Codex | &FS0=1&C1&D3*FL3*SC1*SM3*DC1 | |
Multitech | &FS0=1&C4&D3$SB115200 | Tip: For Multitech modems: The DTE speed must be expressly declared with the $SB command. Set it to whatever line speed you have configured. Failure to do so results in speed mismatches. |