By Kevin Wallace
CCVP CVOICE quickly Reference (Digital brief Cut)
Kevin Wallace, CCIE No. 7945
ISBN-10: 1-58705-824-3
ISBN-13: 978-1-58705-824-0
As a last examination coaching instrument, the CCVP CVoice speedy Reference, moment version presents a concise evaluation of all ambitions at the CVoice examination (642-436). This electronic brief minimize offers you distinct, graphical-based details, highlighting basically the foremost subject matters in cram-style structure.
With this rfile as your advisor, you are going to evaluate themes on foundational parts of VOIP calls, the outline of dial plans, and the implementation of gateways, gatekeepers, and IP-IP gateways. This fact-filled quickly Reference enables you to get all-important details at a look, assisting you concentration your examine on components of weak point and to augment reminiscence retention of crucial examination concepts.
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Extra resources for Cisco Press CCVP CVOICE Quick Reference
Sample text
Digit Forwarding When the router is connected to a PBX or the PSTN, you need to understand how the router forwards digits. By default, digits that are explicitly matched by the destination-pattern command in a POTS dial peer are not forwarded. For example, consider a destination pattern of 123…, and that pattern matches the dialed digits 1235555. By default, the router forwards only the digits 5555 to the attached equipment, because explicitly matched digits are stripped. To prevent this behavior, you can use the no digit-strip command in dial-peer configuration mode.
931 functions are communicated from one PBX, or other QSIG-speaking node, to another. Consider a few examples of QSIG features: n Callback: If you call another party, and you receive a busy signal, because the other party is on the phone, the callback feature can be used to alert you after their phone goes on-hook. n Call transfer: QSIG can support the transfer of a call, without hairpinning (that is, without having an unneeded tandem hop as part of the call path). n Message waiting: QSIG supports signaling that can activate or deactivate message waiting indicators (MWIs).
2008 Cisco Systems Inc. All rights reserved. This publication is protected by copyright. Please see page 130 for more details. [ 48 ] CCVP CVOICE Quick Reference, Second Edition by Kevin Wallace CHAPTER 4 Understanding and Configuring Digital Voice Ports Chapter 4 Understanding and Configuring Digital Voice Ports Digital voice ports, unlike analog voice ports, have the unique capability to carry multiple simultaneous conversations on the same circuit. Therefore, in installations with multiple circuits (about seven or more), the economies of scale offered by digital voice ports start to make digital voce ports more economically attractive that multiple analog ports.