IP Telephony Basics

by Harte, Lawrence

• ISBN13: 9781932813098
• ISBN10: 1932813098
• Format: Paperback
• Copyright: 2004-06-01
• Publisher: Althos Inc

Table of Contents

Introduction to IP Telephony	1	(12)
Cost Reductions	3	(2)
Increased Control of Telephone Services	5	(1)
Instant Activation	5	(1)
Real Time Accounting and Billing	6	(1)
Revenue Producing Features and Services	7	(1)
Integrated Sales Information and Telephone Systems	7	(1)
Increased Market Presence	8	(1)
Call Routing Control (Intelligent Call Forwarding)	9	(1)
Remote Multimedia Communication	10	(3)
Basic IP Telephony System Operation	13	(12)
Converting Voice to Data	13	(3)
Digitization -- Why and How	13	(2)
Digital Speech Compression--Gaining Efficiency	15	(1)
Sending Packets	16	(3)
Packet Routing Methods	17	(1)
Packet Losses and Effects on Voice Quality	18	(1)
Converting Packets to Telephone Service	19	(2)
Gateways Connect the Internet to Standard Telephones	20	(1)
Managing the Connections	21	(4)
Gatekeepers Control the Calls	22	(3)
IP Telephony System Protocols	25	(12)
Protocols	25	(2)
H.323 Packet Based Media Communication System	27	(2)
Session Initiated Protocol (SIP)	29	(2)
Media Gateway Control Protocol (MGCP)	31	(2)
Supporting Protocols and Software	33	(1)
Skinny Protocol	33	(1)
Telephone Routing Over Internet Protocol (TRIP)	33	(1)
Common Open Policy Service (COPS)	33	(1)
Remote Access Dial In User Server (RADIUS)	34	(1)
Real Time Protocol (RTP)	34	(1)
Architecture for Voice, Video and Integrated Data (AVVID)	34	(1)
Vovida Open Communications Application Library (Vocal)	34	(1)
Multiple Protocols	35	(2)
IP Telephony Service Providers	37	(24)
Internet Telephone Service Providers (ITSP)	37	(7)
What an ITSP Does	37	(2)
Audio Quality	39	(1)
Cost of Service	40	(2)
Features	42	(2)
IP Centrex	44	(7)
Centrex over IP	47	(1)
IP Centrex Enhanced Class 5 Switch	48	(2)
IP Centrex Using Softswitch	50	(1)
Internet Protocol Private Branch Exchange (IPBX)	51	(10)
IP Enabled PBX	54	(2)
Dedicated iPBX	56	(1)
Local Area Network PBX (LAN PBX)	57	(4)
Basic IP Telephony Communication Services	61	(12)
Voice Service	62	(2)
Mobility Management (via Registration)	64	(2)
Call Hold	66	(1)
Call Forwarding	67	(3)
Click To Dial	70	(3)
Integrating IP Telephony With Existing Phone Systems	73	(8)
Direct Connect	73	(2)
Adding VoIP Lines to a Data Network	75	(2)
Integrated Service	77	(1)
Replace a System VoIP Lines	78	(3)
Tying IP Telephony to Other Information Systems	81	(16)
Order Processing Systems	81	(2)
Web Servers	83	(2)
Instant Messaging (IM)	85	(2)
Web Seminars (Webinar)	87	(2)
Mobile Communication Information Service	89	(1)
Database System	90	(2)
Dispatch Systems	92	(1)
Security Systems	93	(2)
Interactive Television	95	(2)
IP Telephony Communication Servers	97	(18)
IP Telephony Administrator	99	(1)
Call Manager	100	(2)
Gateway Manager	102	(1)
Unit Manager	103	(6)
System Manager	109	(1)
Translation Server	110	(1)
User Manager	110	(1)
Conference Server	111	(4)
IP Telephony System Design and Setup	115	(14)
IP Telephony System Design	116	(2)
Hosted IP Telephony Systems	118	(3)
Internet Telephone Service Provider (ITSP)	118	(2)
IP Centrex Operators	120	(1)
Dial Plan	121	(1)
Direct Inward Dialing (DID) Assignments	122	(1)
Hunt Groups	123	(1)
Attendant Switchboard Console	124	(1)
Automatic Call Distribution (ACD)	124	(1)
Voice Mail (VM)	125	(4)
Managing IP Telephony Systems	129	(20)
Service Provisioning	129	(1)
System Capacity Allocation	130	(3)
Policy Server	133	(2)
Equipment Configuration	135	(2)
Equipment Firmware	137	(1)
Testing and Maintenance	138	(4)
Test Plan	142	(1)
Network Address Translation (NAT)	143	(2)
Firewalls	145	(1)
Integrated System Management	146	(3)
IP Telephony System Economics	149	(10)
Equipment Cost	149	(2)
Software Cost	151	(2)
Service Cost	153	(2)
Other Costs	155	(2)
References:	157	(2)
How IP Telephony Is Evolving	159	(10)
Protocol Extensions	160	(1)
Toolkits	161	(1)
Call Processing Scripts and Servlets	161	(2)
SIP for Instant Messaging and Presence Leveraging Extensions (Simple)	163	(3)
SIP Info Method Extensions	166	(3)
Voice Quality, Security, and Reliability	169	(18)
Audio Quality	169	(6)
Toll Quality Audio	169	(1)
Echoes	170	(3)
Audio Distortion	173	(2)
Security	175	(5)
Physical Access	175	(2)
Authentication	177	(1)
Encryption	178	(2)
Reliability	180	(7)
Access Device Reliability	180	(2)
Data Network Reliability	182	(1)
Data Connection Reliability	183	(2)
Call Server Reliability	185	(1)
Feature Operation Reliability	186	(1)
Company Communication System Requirements and Acquisition	187	(36)
Request for Proposal (RFP)	187	(4)
Request for Quote (RFQ)	191	(1)
Defining Communications Requirements	191	(5)
Contracting Authority	194	(1)
Requirement Dates	194	(1)
Decision Criteria	195	(1)
Why Use an RFP for IP Telephony Systems	196	(5)
Issuing and Approval Authority	197	(1)
Requirement Dates	198	(1)
Clear Instructions to Vendors	199	(1)
Unbiased Decision Criteria	199	(1)
Ensure that all Issues are Addressed	199	(1)
Minimize Sales Pitch Misunderstandings	200	(1)
Establish Realistic Expectations	200	(1)
Ensure Best Solution	200	(1)
Establish Scope of Communications Convergence effort	200	(1)
Clarify Pricing and Financing Options	201	(1)
Key RFP Objectives	201	(3)
Provide an Optimal Solution for Company's Communications Requirements	201	(1)
Set Stage for a Successful Cutover	201	(1)
Clearly convey the needs and desired specifications for the Company's Requirements	201	(1)
Identifying Company Communication and Information System Requirements	202	(1)
Telecommunications Requirements	202	(1)
Data Requirements	203	(1)
Company Background	203	(1)
Company's Current Situation	203	(1)
Company's Growth Expectations	204	(1)
What are the Key IP Telephony System Requirements?	204	(10)
Telecommunication Requirements	206	(1)
Data Requirements	207	(1)
Emergency Response	208	(1)
Security	209	(1)
Wiring	210	(1)
Disaster Recovery	211	(1)
Terminal Equipment	212	(1)
Features	213	(1)
Testing Requirements	213	(1)
What Goes into an RFP?	214	(9)
General Procedure	214	(3)
Issuing Company General Information	217	(1)
Respondents General Information	218	(1)
Requirements and Specifications	219	(1)
Terms and Conditions	219	(2)
Pricing and Financing Options	221	(2)
Index	223