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MediaRing
VoizBridge
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Overview
Key Features
Specifications
Overview
With recent advances
in technology and the abundance of IP bandwidth, the prospect of sending
voice over IP networks creates amazing potential for carriers and end
users. The advantages of carrying voice over IP include efficiencies of
combined voice/data over one network, reduced interconnect tariff costs,
bandwidth savings, advanced IP-based services and savings on infrastructure
and support costs. As carriers transition their voice networks to VoIP,
they are faced with issues of network security, scalability and protocol
inter-working of one IP network to another IP network.
MediaRing’s VoizBridge is a proven carrier-class software platform
that provides carriers with a cost-effective, flexible and secured means
to peer with other H.323 and SIP networks.

Image:
Carrier Network - Without MediaRing VoizBridge
Image: Carrier Network - "With" MediaRing
VoizBridge
VoizBridge supports flexible internetworking between Cisco, Clarent, VocalTec
and other H.323 gateways, gatekeepers and softswitches. This protects
carriers’ investment in legacy VoIP gateways while opening the opportunity
to expand with new gateway providers. It also offers carriers the flexibility
in peering partners who may have a variety of gateways.
VoizBridge enables
a graceful migration from H.323 to SIP, by providing H.323 to SIP translation
capabilities, so that calls from a SIP source can be terminated on any
existing H.323 network. This allows carriers to slowly upgrade their VoIP
network as needed, while maximising their return on investment in H.323
gateway equipment.
VoizBridge implements
IP masking for both media and signaling packets to hide network topology.
Carriers can also administer strict call control over their networks using
VoizBridge’s device access authentication and access lists. VoizBridge’s
ability to provide VoIP security becomes critical when carriers start
offering services to the enterprise and consumer market.
VoizBridge also features
centralized collection of call details records with RADIUS support, interoperability
with Open Settlement Protocol (OSP) Server, comprehensive call routing
rules for optimal route selection, easy-to-use web-based GUI for configuration
management, failover and redundant configurations.
Key
Features
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Carrier-class IP to IP interconnectivity. Interconnects N to
N disparate networks for delivery of voice and fax services.
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VoIP vendor & device interoperability. Supports internetworking
between Cisco, Clarent, Vocaltec and other major H.323 gateways, gatekeepers
and softswitches.
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Multi-protocol Support. SIP, H.323 and SIP-H.323 inter-working.
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Secure interconnection via IP masking. Source and destination
VoIP devices only see the IP address of VoizBridge for both signaling
and media streams. Networks are kept separate from one another; changes
in one network are transparent to another.
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Centralized and accurate collection of Call Details Records.
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Centralized and flexible control of call routing decision.
VoizBridge also supports alternate/failover routing; it holds a call until
the call is successfully completed or all route options are exhausted.
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User-friendly, web-based GUI provisioning tool to manage and
configure all VoIP networks participating in the interconnection.
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Distributed topology along with load balancing and fault tolerance
features.
Specifications
Multi-Vendor
Interoperability
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Interoperable
with multiple equipment brands, including:
Cisco, Clarent, Vocaltec, Nuera, HP OCMC, Sonus, Quintum, NetSpeak,
Huawei
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Multiple
Protocol Interworking
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Seamless
inter-working with different versions of H.323 and SIP, as well
as between H.323 and SIP
SIP Protocol support
RFC
2543 Session Initiation Protocol
RFC 3261 Session Initiation Protocol
RFC 3264 An Offer/Answer Model With Session Description
Protocol
RFC 2327 Session Description Protocol
RFC 2976 SIP INFO Method
RFC 768 User Datagram Protocol
RFC 793 Transmission Control Protocol
Session Timer Support – draft-ietf-sip-session-timer
Work with SIP Proxy, Record Route Proxy, SIP Registrars
Operation mode: Back-to-back User Agent
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H.323 Protocol
Support
H323
version 2 & H323 version 4
Faststart & Normal Start
H245 Tunneling on/off
RAS support
Gatekeeper routed call
Interoperability with Clarent Gatekeeper
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H.323 - SIP
IWF Modes (Voice and Fax)
SIP
- SIP
SIP – H323
H323 – SIP
H323 – H323
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DTMF Support
Inband/Out of band/ RFC 2833 |
OSP
Interoperability
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Integrated standards
based OSP client - interoperable with TransNexus OSP Server and AT&T
OSP Server
OSP inter-working function facilitating connectivity between:
Multiple
OSP networks
OSP and non-OSP networks
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NAT
& Topology Hiding
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Capability to
interconnect between multiple private or public network domain configurations
Network Address Translation for both Voice and Signaling packets.
Selective bypass of Media Router
Source number masking - provides a single source number for a destination
network. Limits identity exposure of partner carriers |
Media
Processing
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Audio Codec:
G.711, G.723.1, G.729
Fax: T.38, Cisco Fax |
Digit
Manipulation & Number Translation
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Flexibility to
translate portion of E.164 phone number for rule-mapping
Capability to add/delete/insert digits/prefixes |
Network
Access Control & Security
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Strict enforcement
of Access Control Lists to avoid unauthorized network use
ACL configurable based on IP Address
Automatic port closures when idle to prevent hacker attacks
Conforming to CERT Advisory CA-2003-06 - not vulnerable |
Session
Routing & Admission Control
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Centralized control
of call routing decisions using one of the following:
MediaRing’s
integrated Route Management System
OSP Server via OSP Protocol
Standards based H.323 Gatekeeper using RAS
Standards based SIP Proxy
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Configuration
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Web-based graphical
user interface
Command Line Interface using Telnet (SSH)
Centralized provisioning & data repository for multi-VoizBridge
networks |
Accounting
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Accurate Call
Detail Record generation for billing purposes using:
Using
Transaction Logs (Daily or configurable frequency)
RADIUS Interface with support for multiple RADIUS servers
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Network
Management
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SNMPv2
Graceful shut-down
Auto start-up |
High
Availability
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Redundancy and
Failover configurations available
Load Balancing
Multiple Media Router support with Failover and Load Balancing |
Platform
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Sun Solaris OS
Ver 5.7, 5.8
RedHat Linux AS |
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