| Features |
| VoIP gateways provide a variety of
features, including packetization (translating analog signals
into digital IP packets), voice compression / decompression,
signal control and call routing.
The key features to consider in a VoIP
gateway include integration with an existing PBX and IP
infrastructure, ease of deployment through vendor support,
extensive compatibility with new VoIP equipment and an existing
data
server colocation network infrastructure.
Other attributes worth considering are
PSTN failover (analog line backup in case the VoIP connection
goes down), true H.323 and SIP survivability (the ability to
maintain VoIP connections through poor conditions), efficient
multiplexing and NAT traversal and analog device support.
VoIP gateways can be either hardware or
software based. Hardware-based VoIP gateways--by far the most
widely used--are available as standalone boxes, chassis cards or
modules. Hardware VoIP gateways, are generally more expensive
than their software counterparts but are usually preferred
because they are more reliable, provide built-in interfaces and
don't consume computer processing power. |
| lFinding an appropriate VoIP
gateway |
| requires a close examination of
three core variables. First, understand that the gateway's
chassis size often dictates the unit's packet processing
capacity. Sluggish processing leads to poor VoIP call quality,
user complaints and, potentially, lost business. Second, the
number of simultaneous VoIP calls the gateway can handle is
critical, so it's important to select a device that can hadle
the network's call load. One should purchase a gateway that can
handle a call load that's 20 percent greater than current
levels. This way, the gateway can accommodate reasonable
business growth without premature upgrading or replacement.
Third, the number and variety of interfaces provided by the
gateway is crucial, since a lack of suitable ports can make
connecting external equipment to the gateway very difficult, and
sometimes an impossible task. |
|
|
|
 |
|
|
VOIP
Colocation
Special Offer:
 |
|
|
|
|
 |
|
Cisco AS5350
Universal Gateway |
|
CiscoAS5350XM
Universal Gateway |
 |
|
| The Cisco AS5350 Universal Gateway
is the only one rack unit gateway supporting two-, four-, or
eight-T1/seven-port E1 configurations that provides
universal port data, voice, and fax services on any port at
any time. The Cisco AS5350 Universal Gateway offers high
performance and high reliability in a compact, modular
design. This cost-effective platform is ideally suited for
Internet service providers (ISPs) and enterprises that
require innovative universal services. |
|
| The AS5350XM Universal Gateway
offers unparalleled capacity and the flexibility to deploy
advanced voice, fax, and remote access services in only one
rack unit (RU). The Cisco AS5350XM Universal Gateway
doubles the performance of the Cisco AS5400HPX and delivers
significant memory enhancements to offer high performance
and high reliability in a compact, modular design. It easily
supports public switched telephone network signaling,
gateway signaling, voice codec, fax, VoiceXML, RADIUS, Tool
Command Language, and interactive voice response.
|
|
|
|
|
 |
| Quintum Tenor
AXT800-C 8 Port FXO VoIP Gateway with Eight
VoIP Channels |
  |
|
Quintum 8 port
FXO VoIP Gateway with 8 VoIP channels. A more intelligent
way to implement VoIP.
The Tenor AX Series offers:
-
SelectNet™ provides superior voice quality
-
Tranparent
MultiPath Call Routing
-
Integrated
H.323 gateway and gatekeeper
-
SIP User Agent
-
IVR/RADIUS AAA
compliant
-
Stackable
architecture
-
Answer and
Disconnect Supervision
-
8 Analog line
and trunk interfaces
-
Up to 8
simultaneous VoIP calls
|
|
|
|
|
|
| Quintum Tenor
AXT1600-C 16 Port FXO VoIP Gateway with Sixteen VoIP Channels |
|
|
|
Quintum 16 port
FXO VoIP Gateway with 16 VoIP channels. A more intelligent
way to implement VoIP.
The Tenor AX
Series offers:
- SelectNet™ provides superior voice quality
- Tranparent MultiPath Call Routing
- Integrated H.323 gateway and gatekeeper
- SIP User Agent
- IVR/RADIUS AAA compliant
- Stackable architecture
- Answer and Disconnect Supervision
- 16, Analog line and trunk interfaces
- Up to 16 simultaneous VoIP calls
|
|
|
|
|
| Quintum Tenor
AXT2400-C 24 Port FXO VoIP Gateway with Twenty Four VoIP
Channels |
|
|
|
Quintum 24 port
FXO VoIP Gateway with 24 VoIP channels. A more intelligent
way to implement VoIP.
The Tenor AX
Series offers:
- SelectNet™ provides superior voice quality
- Tranparent MultiPath Call Routing
- Integrated H.323 gateway and gatekeeper
- SIP User Agent
- IVR/RADIUS AAA compliant
- Stackable architecture
- Answer and Disconnect Supervision
- 24 Analog line and trunk interfaces
- Up to 24 simultaneous VoIP calls
|
|
|
|
|
|
