Voice & Data Convergence
January 11, 2001
PSTN = Public Switched
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
VoIP Signaling Protocol
H.323- ITU standard for
transmitting audio video and
data across an IP network.
IP Telephony is the technology
which allows for data, voice, and
video to be transmitted over a
single, IP based network
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
MCS-7835 Call Mgr. OIR
PSTN Service UF Campus Core
Analog Gtwy -4
CI SCO V G200
V OI E GATEW
P OW R
E RP S ACT VI Y
MCS-7835 Call Mgr. Telecomm
Lower Total Cost of Ownership:
– reduced PSTN circuits
– reduced long distance
– reduced operational costs (MAC)
– unified MIS for voice & data