Cisco 1005 - 1005 Router Manual de usuario descargar pdf (Pagina 5)

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)

Note: If you are routing over the AUX port, notice that each character generates a processor interrupt.

Abnormally high CPU utilization may be resolved by using a lower AUX port speed.

Modem Configuration

We recommend using the modem autoconfigure type <modemcap_name> command (introduced in Cisco

IOS Software Release 11.1), to configure modems attached to async lines. If you are using a version of

Cisco IOS Software earlier than 11.1, script startup and script reset can be used to configure the modems

via a chat script.

For most applications, a modern modem should be configured as follows:

Reset to factory defaults (use a hardware flow control template if possible).

●

Use hardware (RTS/CTS) flow control.●

Use normal modem control (hang up on DTR drop; drop DCD on carrier drop).●

Enable, but do not require, error control (LAP-M [V.42] and MNP).●

Enable, but do not require, data compression (V.42bis).●

Enable all modulations supported by the modem.●

Lock DTE speed at the highest rate supported by both the modem and the async line.●

Enable autoanswer if needed; when in autoanswer mode, ignore the escape sequence (+++).●

For details on the command set used by your modem, consult the documentation provided by your vendor

or see the www.56k.com page for a list of links to this documentation.

Using Modemcaps and modem autoconfigure

Cisco IOS Software maintains a set of built-in modemcaps for various internal and external modems. Here's

an example modemcap from Cisco IOS Software Release 11.3(9)T:

router#show modemcap

default

codex_3260

usr_courier

usr_sportster

hayes_optima

global_village

viva

telebit_t3000

microcom_hdms

microcom_server

nec_v34

nec_v110

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