Modem Signal and Line States

Signal and Line State Diagrams

Figure 27 EXEC and Daemon Creation for Incoming and Outgoing Calls

Idle state

DTR high, watching

CTS

CTS raised

Close connection,

DTR low for

5 seconds

Hang up

DTR going low

CTS lowered

DTR high,

 

watching

Ready

CTS

 

User-typed

activation

character Create

EXEC

Ready

 

 

 

 

DTR high,

 

and

 

watching

 

active

 

CTS

 

 

 

 

 

 

Incoming network

 

 

connection

 

 

 

Create

 

 

daemon

 

 

 

 

Ready

 

 

 

 

 

DTR high,

 

 

 

watching

 

 

and

 

CTS

 

 

active

 

 

 

 

 

CTS lowered

CTS lowered or

 

or exit

 

network

 

 

 

 

connection

S1004a

 

closed

 

 

Note If your system incorporates dial-out modems, consider using access lists to prevent unauthorized use.

Configuring a Line Timeout Interval

To change the interval that the Cisco IOS software waits for the CTS signal after raising the DTR signal in response to the DSR (the default is 15 seconds), use the following command in line configuration mode. The timeout applies to the modem callin command only.

Command

Purpose

 

 

Router(config-line)# modem answer-timeoutseconds

Configures modem line timing.

 

 

Note The DSR signal is called RING on older ASM-style chassis.

Cisco IOS Dial Technologies Configuration Guide

DC-161

Page 5
Image 5
Cisco Systems DC-157 Configuring a Line Timeout Interval, DC-161, CTS lowered, User-typed Activation Character Create

DC-157 specifications

Cisco Systems DC-157 is a robust solution designed to cater to the evolving demands of data center environments. Aimed at enhancing network efficiency and providing an optimal infrastructure for cloud-based applications, the DC-157 is noted for its exceptional scalability, reliability, and performance. With an increasing reliance on digital transformations, Cisco has strategically positioned the DC-157 as an essential component for businesses seeking to modernize their data centers.

The DC-157 integrates advanced technologies that streamline data operations and ensure seamless connectivity. One of its main features is the support for high-density configurations, which allows organizations to maximize their data center space while minimizing energy consumption. This is facilitated through a highly efficient power management system that not only optimizes energy use but also contributes to a greener data center environment.

In terms of networking, the DC-157 leverages Cisco’s renowned routing and switching technologies that guarantee low-latency connections and rapid data processing. The device supports various protocols, ensuring compatibility with a diverse range of networking equipment and enhancing interoperability across different platforms.

Management of the DC-157 is significantly simplified through Cisco's advanced network management tools, which provide comprehensive monitoring and analytics capabilities. Administrators can easily track performance metrics, manage traffic flow, and swiftly identify potential bottlenecks, ensuring consistent and reliable service delivery.

Security is a cornerstone of the DC-157’s architecture. The device is equipped with built-in security features that protect data integrity and prevent unauthorized access. With end-to-end encryption and automated threat detection, organizations can confidently deploy applications and services without the fear of data breaches.

Additionally, the DC-157 supports virtualization technologies that allow for the dynamic allocation of resources. This flexibility is essential for businesses that require rapid deployment of applications and services, enabling them to adapt quickly to changing market demands.

In summary, Cisco Systems DC-157 stands out with its combination of scalability, reliability, and advanced features. By integrating cutting-edge technologies and strong security measures, Cisco provides a data center solution that not only meets current needs but is also future-ready, ensuring organizations can thrive in a constantly evolving digital landscape. As businesses continue to leverage data as a strategic asset, the DC-157 proves to be an indispensable resource for optimizing data center operations.