ABC-VPN
Alcatel’s ABC-VPNs are used as a
complete solution, or as a way to
handle peak overloads from leased line
and other network alternatives. Leased
lines can be sized based on the
average – rather than peak – traffic
loads. When the leased lines become
saturated, additional calls are
transparently routed across the public
switched network, using integrated
compression if desired. This reduces
costs and increases network availability.
Another alternative is a full VPN
architecture, which requires only one
permanent connection, which can be
low speed, for signaling. All voice
traffic is handled by public switched
digital connections, using integrated
compression, if desired. It is:
• Compliant with QSIG and ISDN /
PSTN networks
• Integrated compression over QSIG
and ISDN / PSTN networks
The OmniPCX Enterprise uses a
disassociated signaling concept. This
means that calls can be routed over one
path (for example, the PSTN) while
inter-OmniPCX Enterprise signaling is
sent over another path:
• Analog link via modem
• Digital serial link
• Ethernet TCP/IP networks
• ISDN/QSIG B channel
• Leased line D-channel
• PLL X.25 in ISDN D-channel.
(Country dependent)
ABC on demand
This solution makes it possible to build
a powerful private voice network over a
public switched network without any
permanent connection. It combines an
integrated voice compression engine
with signaling on demand.
When required, one B channel
connection is set up between two nodes
and functions as a virtual leased line,
transporting the network signals and the
compressed voice. Up to eight calls are
carried in a single B channel. The
virtual leased line is released when the
call ends.
Analog ABC
Analog ABC uses analog leased lines
for voice traffic. Analog ABC is cost-
effective for international networks and
countries with attractive tariffs for
analog links. In addition, existing
legacy networks based on analog lines
can be optimized with full ABC feature
transparency; the disassociated
signaling is transported via:
• Analog link via modem
• Ethernet TCP/IP networks
ISVPN (ISDN based VPN)
This service uses a D-channel service of
public networks called user-to-user
signaling (UUS1). ISVPN is a
networking solution with implementation
of all basic networking features. ISVPN
services:
• Basic call
• Call back request
• Call forwarding
• Centralized attendant
• Enquiry call
• Homogeneous-numbering plan
(based on virtual DID)
• Intrusion
• Name and number identification
• Overflow
• Path optimization
• Transfer on no reply and
conversation.
All networking solutions – using
networks based on digital leased lines,
analog leased lines, IP, frame relay,
ATM, ABC-VPN, or VPN on demand –
inter-work perfectly and provide a
consistent and unique level of service.
ALCATEL 7 >
Distributed Systems and Networking
Virtual Private Network
Networking small sites with low or medium voice traffic does not always justify dedicated leased lines. As a result of
technical evolution of their infrastructure, carriers now offer an increasing number of switched network options at
increasingly attractive costs. The Alcatel OmniPCX Enterprise supports versatile virtual solutions with real advantages.
(26 pages)
(27 pages)
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