Telco Basics, Convergence and Total Network Connectivity. Lesson 3. Some interesting numbers from CNN. From: http://money.cnn.com/2003/08/28/pf/saving/hotjobsnow/index.htm. Review: What are our goals in Security?. The “CIA” of security Confidentiality Integrity Availability
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Incident HandlingComputer Security Operational Model
+ (Detection + Response)
Textbook uses Prevention, Detection and Remediation
Quarter toneSome other ”phun phone sounds”
From Newton’s Telecom Dictionary, 15th ed
intranet, Internet, VPNs
PSTN, ISDN, wireless
From: “Security Requirements and Constraints of VoIP” by Mika Marjalaakso
Unreliable Transport (UDP)
Reliable Transport (TCP)
From: IP Telephony, by Goralski & Kolon
Standards for IP Telephony
H.323 for IP Telephony
April 03, 2000, Issue: 807, http://www.internetwk.com/
Cisco Pushes VoIP To The Fore –
Merrill Lynch, TI seek cost savings in new convergence products
Cisco last week beefed up its voice and data convergence arsenal with new enterprise-oriented voice-over-IP products.
The new hardware and software, bundled under Cisco's Architecture for Voice, Video and Integrated Data (AVVID) nameplate, is an outgrowth of Cisco's plans to mesh its voice and data products under a single architecture.
Both Merrill Lynch and Texas Instruments Inc. have been testing various components of AVVID for the past several months.
"There are clear advantages to be gained in deploying this platform," said Don McFarlane, system architect at Merrill Lynch.
"We expect costs to be reduced as we deploy unified messaging and have a uniform troubleshooting capability" for administering a single voice and data conduit, he said.
Texas Instruments is using VoIP to link its overseas offices to trim telecommunications costs. The company is also using Cisco VoIP products as part of a trial with Expand Networks Inc. to push VoIP traffic over connections linking TI offices in Texas with remote facilities maintained by the company in Mexico.
Among the products rolled out by Cisco were enhanced call processing management software, second-generation IP phones, more advanced support of VoIP in its Catalyst 6000 line of switches, as well as a new media server
supporting converged voice/data networks.
The products will be available later this spring. Among the new products: the 7910 and 7960 IP phones are priced from $145 to $495; the Cisco MCS server, an NT platform that supports transmission of voice, video and data across Cisco
switches and routers, is priced at $14,995.
CallManager software, which runs on the server, is offered free to existing customers and is preinstalled on the MCS server. The latest version of the software, compatible with Windows 2000, is capable of handling up to 100,000
users in a cluster made up of up to five media servers.
"Cisco's move is a further endorsement of IP telephony within the enterprise,“ said analyst Tere Bracco of Current Analysis.
"With a player like Cisco aiming products at large companies, it's telling IT managers that VoIP isn't a toy anymore; it's an inducement for businesses to take a look at this technology.
What Will Drive VoIP?
Still, Bracco said convergence isn't necessarily what will drive enterprises to sample VoIP.
"It's the management that will drive deployment," she said. "Managing these IP devices is much simpler and can help a company save a lot of money for moves, adds and changes."
Call request signal
A B C D
A B C D
Circuit Switching Packet Switching
Dedicated Bandwidth Yes No
Quality of Service
Voice Quality Toll-quality Non-toll-quality
Delay Latency Minimal Variable
Utilization Level Poor High
Economics of Utilization Low High
Call management features Numerous Few
. . . . . . . . . .
WirelessAnd what else could possibly happen next?