Transcript VoIP Project Overview - University of Florida

Voice & Data Convergence
Network Services
January 11, 2001
PSTN = Public Switched
Telephone Network
Although the PSTN is effective and
does a good job at what it was built
to do (switch voice calls), many
businesses are striving to change it
to a new network whereby voice
rides on top of a data network.
Drawbacks to the PSTN
Data has overtaken voice as the primary traffic on
many networks built for voice.
The PSTN cannot create and deploy features quickly
enough. Only the venders of the equipment could
develop the applications for that equipment.
Data, Voice, & Video cannot converge on the
inflexible PSTN as currently built.
Wasted bandwidth using a 64k connection.
VoIP = Voice over IP
Provides an advanced digital
communications network that
bypasses the traditional public
switched telephone system and
uses the Internet to transmit
voice communication.
VoIP Signaling Protocol
H.323 - ITU standard for
transmitting audio video and
data across an IP network.
IP Telephony
IP Telephony is the technology
which allows for data, voice, and
video to be transmitted over a
single, IP based network
infrastructure.
IP Telephony Pilot Project
In the 4th Q 2000, Network Services, in
cooperation with Telecommunications
and OIR have begun to implement IP
Telephony on the UF campus. Cisco’s
AVVID (Architecture for Voice, Video
and Integrated Data) family of products
were chosen because of their scalability
and availability in the current market.
UF AVVID Campus Pilot
Analog Gtwy -4
MCS-7835 Call Mgr. NERDC
7960
C3524-PWR
MCS-7835 Call Mgr. OIR
7960
C3524-PWR
PSTN Service
UF Campus Core
C3524-PWR
PRI
(future)
C3524-PWR
Analog Gtwy -4
7960 DDF/CETS
CI SCO V G200
V OICE GATEWAY
P OWE R
RP S
ACT
I VIT Y
VG200
MCS-7835 Call Mgr. Telecomm
7960
Key Benefits
Lower Total Cost of Ownership:
– reduced PSTN circuits
– reduced long distance
– reduced operational costs (MAC)
– unified MIS for voice & data
Key Benefits (cont’d)
Next generation business
applications:
Unified messaging
integrated email, voice mail,
fax
Web-Telephony Integration /
CTI
push / pull technology
telecommuting / telelearning
The Next Steps
Rollout phones to test sites
H.323 Gateway to PSTN
Call Manager Clustering
Unified Messaging
Cisco IP Phone
Model 7960
Executive set:
– 6 programmable line
/feature
– 4 interactive soft
keys:
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Messages
Directory
Help
Settings
Services
– graphic capability
Cisco Call Manager
Administration
– phone / user setup
– features:
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caller id
call forwarding
call park / hold
DID / DOD
Distinctive ring
Call Detail Records
Etc.
VoIP Issues
Call Management
– cost accounting
– cost modeling / production pricing
– admin policy
– dial plan
VoIP Issues (continued)
QoS
– bandwidth limitations
– Traffic Shaping (control the usage)
– delay
– jitter
– packet loss
VoIP Issues (continued)
Wireless Applications
Open Interoperability
– standards development
Security
– 911, E-911
– network
– policy
Credits:
• Cisco Systems, Inc.
• Telecommunications, UF.
• Network Services, UF