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> Services > Voice over IP > Products >
IP PBXs > Features |
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| It's
Easy |
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Just
connect a Quadro to your broadband Internet
service (Ethernet or ADSL or SDSL). The Quadro
automatically configures itself. And in minutes,
you are able to make voice over IP calls for
free. Connect up to four ordinary phones into
it, or assign four PBX trunks so that your entire
office or household can use the Quadro. The
voice quality through the Quadro's digital signal
processor (DSP) will almost always be better
than using your current long distance company.
When there isn't a Quadro device on the other
end, you can still call free of charge to any
IP phone or computer. By using a VoIP gateway
service, you can talk long distance to anyone
on the public phone network for pennies per
minute.
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| It's
Flexible |
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Up to four FXO lines or three
ISDN lines go to your local phone company so
you can make calls from home or on the road.
When you call from outside the office, Quadro's
Caller ID recognizes your mobile phone number
and immediately authenticates your access to
the Quadro. Just dial your associate's extension
and the Quadro routes your call on the best
route possible either down the hall or around
the globe.
Since the Quadro also contains
call forwarding and call routing instructions,
people who are out ofthe office can still be
reached automatically. New York, Los Angeles,
London, Tokyo or Buenos Aires, the world becomes
your virtual office. Communications has never
been so inexpensive,flexible or convenient.
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| It's
Secure |
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Most Quadro models have a
lifeline safety feature in the event of power
failure. If power goes out, one phone immediately
connects to the public phone network for emergency
services. The Quadro has many PBX (Private Branch
Exchange) features such as voice mail, 3-way
conferencing, call waiting, and call statistics
to name a few. The Quadro is also packed with
an amazing array of network features including
a firewall and a virtual private network (VPN)
for secure, private voice and data communications.
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| It's
Inexpensive |
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| The
purchase price of the Quadro is justified by the
quantifiable cost savings associated with all
long distance and international calls made through
the Quadro. You will realize a quick payback on
your initial investment and, then, enjoy recurring
cost savings every time you use your Quadro.
No obsolescence.
No upgrades.
No maintenance fees.
No license fees.
Revolutionary?
Absolutely!
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| Interfaces |
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A good place to start is
always with the back panel. The Quadro IP PBXs
offer connections for up to four phone lines
(FXO) and up to 16 phone extensions (FXS). The
ISDN variants (2xi, 4xi, 4xia, 16xi and 16xis)
deliver up to three ISDN ports in-stead of the
FXO ports. An Ethernet 10/100BASE-T port connects
all variants of Quadro to your local area network.
One 10BASE-T Ethernet port or one DSL port allow
access to your wide area network (WAN). But
this review of Quadro interfaces does not convey
the power of the product or the abundance of
diverse missions it fulfills. The Quadro shapes
network traffic by prioritizing voice over data
to ensure voice quality for VoIP at all times.
Internet connection sharing allows multiple
client side router network to utilize the same
Quadro.
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| How
does the Quadro do it? |
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Although using the Quadro
is easy, it is supported by a very sophisticated
and complex system. Inside the Quadro device,
two communications infrastructures come together.
One infrastructure is the traditional
telephone network. The other is the Internet.
At the core of the Quadro is the Call Manager.
It resides on a CPU running Linux software.
The Call Manager maintains
state and interfaces with the FXS and FXO ports
to set up andterminate voice calls. The Call
Manager performs traditional telephony PBX functions
such as callhold, call transfer, and voice mail.
The Call Manager also sends voice streams through
the digital signal processor for voice compression.
Then, voice streams are passed
from the DSP to the CPU where IP headers are
added for routing via the Internet. Other IP
applications include DHCP and PPP, Network Address
Translation (NAT), Network Time Protocol (NTP)
for clock synchronization, a WEB server (HTTP)
for configuration and monitoring, a Simple Mail
Transfer Protocol (SMTP) client, a firewall,
Intrusion Detection System (IDS), Domain Name
Service (DNS), Virtual Private Network (VPN)
and a Session Initiation Protocol (SIP) agent
for retrieval of call routing information from
public and private SIP servers.
Future enhancements extend
the Quadro with additional USB driver support
and VoATM (LoopEmulation Service or LES).
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