MediaRing VoizBridge
Download PDF

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

·         Carrier-class IP to IP interconnectivity. Interconnects N to N disparate networks for delivery of voice and fax services.

·         VoIP vendor & device interoperability. Supports internetworking between Cisco, Clarent, Vocaltec and other major H.323 gateways, gatekeepers and softswitches.

·         Multi-protocol Support. SIP, H.323 and SIP-H.323 inter-working.

·         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.

·         Centralized and accurate collection of Call Details Records.

·         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.

·         User-friendly, web-based GUI provisioning tool to manage and configure all VoIP networks participating in the interconnection.

·         Distributed topology along with load balancing and fault tolerance features.


Specifications

Multi-Vendor Interoperability

Interoperable with multiple equipment brands, including:
Cisco, Clarent, Vocaltec, Nuera, HP OCMC, Sonus, Quintum, NetSpeak, Huawei
Multiple Protocol Interworking

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

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

H.323 - SIP IWF Modes (Voice and Fax)

SIP - SIP
SIP – H323
H323 – SIP
H323 – H323

DTMF Support
Inband/Out of band/ RFC 2833

OSP Interoperability
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

NAT & Topology Hiding
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
Audio Codec: G.711, G.723.1, G.729

Fax: T.38, Cisco Fax
Digit Manipulation & Number Translation
Flexibility to translate portion of E.164 phone number for rule-mapping

Capability to add/delete/insert digits/prefixes
Network Access Control & Security
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

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


Configuration
Web-based graphical user interface

Command Line Interface using Telnet (SSH)

Centralized provisioning & data repository for multi-VoizBridge networks
Accounting

Accurate Call Detail Record generation for billing purposes using:

Using Transaction Logs (Daily or configurable frequency)
RADIUS Interface with support for multiple RADIUS servers

Network Management
SNMPv2

Graceful shut-down

Auto start-up
High Availability

Redundancy and Failover configurations available

Load Balancing

Multiple Media Router support with Failover and Load Balancing
Platform
Sun Solaris OS Ver 5.7, 5.8

RedHat Linux AS