Understanding the PSTN

Pstn Connections

All the signaling standards and communication methods discussed in the previous section typically focus around the connection to one, massive voice network known as the public switched telephone network (PSTN). If you have ever made a call from a home telephone, you have experienced the results of the traditional telephony network. This network is not unlike many of the data networks of today. Its primary purpose is to establish worldwide pathways allowing people to easily connect, converse,...

Cisco Unity Express Configuration

Unity Cisco Cli

This section examines the configuration needed for Cisco Unity Express to communicate with Cisco Unified CME. This includes the final Cisco Unity Express CLI configurations and the Cisco Unity Express web initialization. The CME CLI configurations needed for interoperability between Cisco Unified CME and Cisco Unity Express are also discussed. Cisco Unity Express Post-Installation Configuration After an installation or upgrade of Cisco Unity Express software, the system will run the...

Configuring a Voice Network Directory

When most people think of a corporate phone directory, visions of Microsoft Excel spreadsheets e-mailed out monthly come to mind. Isn't there a better way Sure there is Cisco IP phones support a local directory that you can update from the CME router as you are configuring devices. You can enter names under ephone-dn configuration mode either as you are configuring new lines for the organization or separately, after you have configured the lines. These names are used both for building the...

CCNA Voice Official Exam Certification Guide

Jeremy Cioara, CCIE No. 11727 Michael J. Cavanaugh, CCIE No. 4516 Kris A. Krake, CCIE No. 10229 Copyright 2009 Cisco Systems, Inc. Cisco Press logo is a trademark of Cisco Systems, Inc. Published by Cisco Press 800 East 96th Street Indianapolis, IN 46240 USA All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without written...

Layer 3Multilayer Switching

This final form of inter-VLAN routing uses a router integrated into a switch. This is most often called a Layer 3 or multilayer switch. The concepts are the same as the previous router-on-a-stick design however, the router is now internal to the switch. To facilitate routing within the switch, you must configure switched virtual interfaces (SVIs), as shown in Figure 3.13. SVIs are virtual interfaces supported on Layer 3 switches that route traffic for their assigned VLAN number. As soon as the...

Using Dial Peer Wildcards

As you have seen in the previous few sections, configuring dial peers (and destination patterns) without using wildcards would be extremely time consuming. By far, the most commonly used wildcard is the dot (.), which represents any dialed digit. There are a few other wildcards in addition to this that you will find useful in your configurations. Table 8.3 provides a description for these wildcards. Table 8.3 Wildcards You Can Use with the destination-pattern Command Table 8.3 Wildcards You Can...

Installing Unified CME on a Cisco Router

One advantage of Cisco IOS is the ease of installation and upgradability. To perform an IOS installation or upgrade, you can set up a TFTP server on your PC, download IOS from Cisco.com, and then enter a command similar to the following Assuming your TFTP server is working correctly and assigned the IP address 172.16.2.5, the single BIN IOS file would copy over. Once you reboot the router, you would be running the new IOS version. Installing Cisco Unified CME is not quite as simple. Rather than...