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Overview of General Modem and NAS Line Quality
This document discusses ways to verify the performance of the digital modems at the network access server (NAS) as well as the T1/E1 line connected to the NAS. It will not discuss the performance or configuration of the client side modems. For more information...
09 Jul 2007
This document provides an explanation of the most common impairments that can be identified by examining the line shape parameter reported by the show modem operational-status command. This command is also discussed in the Overview of General Modem and...
09 Sep 2005
Modern analogue modem communications have become very complex. The latest technologies no longer rely on a simple basic layout, but expect the telephone company (Telco) cloud be built on digital technology end-to-end. This has led to a dramatic increase in bandwidth at the cost of increased...
03 Sep 2006
This document provides an explanation of transmit (Tx) and receive (Rx) levels on modems.
19 Nov 2007
When you troubleshoot modem connections, it is important to evaluate three main areas: the client modem, the telco network and the Network Access Server (NAS). You must ensure that the modems on either side, and the telco network work properly, because problems with any of...
03 Sep 2006
Many Internet Service Providers (ISPs) purchase 56k modems and V.92 capable modems so that their users can use V.90 connection speeds. Unfortunately,V.90 performance can be elusive. In many cases,this is due in part to the many different client modems used by customers.
05 Feb 2010
This document provides information on the analog modem Wide Area Network (WAN) interface cards (WIC-1AM or WIC-2AM), their product numbers, features, platform support, LEDs, and configuration.
14 Sep 2005
This document provides a general technical overview of three common types of client modems seen in the field.
29 Jan 2008
This document illustrates the order in which Quality of Service (QoS)features are executed when applied inbound or outbound to an interface on arouter running Cisco IOS® software. QoS policies are configured with themodular QoS Command Line Interface (MQC). This document also discusses...
15 Feb 2008
This document describes how to interpret the call disconnect reason codes reported by Cisco Modem ISDN channel aggregation (MICA) modems.
13 Oct 2005