Diagram Specifications PDFs Product Photography

HDX-with-MSC.jpgREDCOM’s HDX with TRANSip® is an integrated softswitch and media gateway platform that delivers interoperable communications to service providers, ILECs/CLECs and private networks. Built on an industry-standard SIP-based architecture, HDX preserves all the functionality and investment in legacy assets, while offering safe passage to modern VoIP technology. 

HDX Benefits

  • VoIP call management, media gateway & TDM all in one platform
  • IMS interoperability via industry-standard SIP-based architecture
  • Up to 3,000 IP subscribers & SIP trunking
  • Interoperable with multiple access solutions: SIP, MGCP/NCS (PacketCable 1.5), GR-303 & V5.2
  • VoIP security: TLS/SRTP/SSL

A low-risk transition to IP networks

icon-transition.jpgHDX provides a high assurance migration solution that enables carriers to schedule a phased approach to VoIP implementation, risks, and financial exposure. Traffic, subscribers, and services are cut-over when it makes sense for your business, eliminating a high risk wholesale replacement. HDX facilitates a cost effective way to add packet voice (IP) to an existing TDM switching network, while allowing service providers to retain legacy equipment investments. 

Improve network efficiency

icon-efficiency.jpgDesigned for geographic distribution throughout the Cloud, HDX enables carriers to keep the intelligent resources closer to the end user, and to share service resources for cost control and network resilience. Compatible with both legacy networks and the IMS network architecture, HDX drops into existing networks while providing a leap into the future, allowing carriers to select the most efficient and cost effective transport  routes. In fact, HDX makes the old centralized exchange model obsolete, replacing it with a truly distributed Cloud voice services architecture.

Remote/access solutions

icon-remote.jpgSharpen your competitive edge with remote subscriber access via SIP, MGCP/NCS, GR-303, V5.2, or direct wired lines. Supporting both legacy TDM remotes and SIP-enabled Access Nodes with DSL, the HDX enables carriers to modernize the access network on a responsible schedule. REDCOM’s Intelligent Remote model preserves local communications during catastrophic network failures. Key services (e.g., fire, police, government) front-ended with the HDX can continue to operate even if the network core or significant transmission assets are compromised.

The lowest total cost of ownership

icon-cash.jpgDon’t burn your OpEx budget with the recurring costs of multi-year maintenance contracts. HDX users enjoy NO scheduled maintenance, NO annual service contracts, and NO forced upgrades. Carriers realize a substantial reduction in OpEx when replacing legacy exchanges. Considering that recurring maintenance and service contracts typically double the price of most softswitches within four or five years, it’s comforting to know that lifetime costs for the HDX won’t be much more than the initial purchase. Click here to learn more about total cost of ownership…

Increase revenue with Centrex

icon-centrex.jpgThe HDX allows you to compete by adding new revenue streams through Centrex services for both analog and VoIP users. The Centrex solution is deployed on your network as a price-oriented alternative to traditional PABXs. Centrex enables carriers to expand their service offerings to businesses, eliminating costly PABXs.

Application development API

icon-api.jpg“Killer Apps” may be a vestigial term, but the business is still alive. Create custom softswitch and media gateway applications with REDCOM’s Application Programming Interface (API). The HDX is the perfect platform for carrier-class prototyping and developing applications to drive new revenue sources.

Secure & encrypted communications

icon-secure.jpgTRANSip, REDCOM’s VoIP technology suite, offers an additional layer of security for VoIP traffic with the ability to encrypt calls. Secure Real-Time Transport Protocol (SRTP) and Transport Layer Security (TLS) are available to encrypt the SIP call signaling and client authentication to ensure confidential communications.

SIP trunking made easy

icon-siptrunk.jpgSIP trunking is a cost-effective way for service providers to leverage their IP network to reduce costs. SIP trunks deliver a significant return on investment and TRANSip-equipped HDX softswitches have extensive SIP trunking capabilities to ensure that your switching resources fit your business model for current and future growth.

Distributed architecture

icon-distributed.jpgThe HDX system architecture minimizes the risk of single point failures as it distributes resources system-wide and network-wide, using multiple points of direct access. Individual HDX systems can be distributed geographically throughout the Cloud, which increases network resilience and allows carriers to share resources and lower costs.

HDX Next Generation Network


HDX Specifications

Primary Configurations

  • Class 5 End Office
  • Class 4 Tandem/Transit Exchange
  • Media Gateway
  • International/IP Gateway
  • Call Manager

Physical Specifications

  • 19 in rack mount / 48 cm
  • Power:
    • –48 VDC
    • 100/120/240 VAC, 50–60 Hz
  • Environment:
    • Operating temperatures: 32–122 °F / 0–50 °C ambient
    • Operating humidity: 5%–95% (non-condensing)
    • Operating elevation: Tested at 10,000 ft (3048 m)

System Architecture

  • Distributed Control
  • Redundant Processor
  • Hot-Swappable Interfaces and Processor Boards
  • 4,096 Ports non-blocking
  • Carrier-Class Reliability: 99.999% (“five nines”)

System Features

  • Administrative Package
  • Call Records SMDR/CDR/LAMA
    • Bellcore AMA Format (BAF)
  • Emergency Services (911)
  • Local Number Portability (LNP)
  • Multiple Home Exchanges
  • Percentage Trunking
  • REDCOM ClusterNet™: host/remote for integrated network operation
  • Three PIC Equal Access
  • Time-of-Day Database Changes
  • (Least Cost Routing)
  • Toll Restriction
  • User Defined Announcements
  • Voice Mail System Interface
  • Web Portal for Subscribers, Centrex and Administration
  • Zone Paging

Network Management

  • E-Mail: maintenance notes and traffic usage reports to any e-mail address
  • Management of multiple systems via REDCOM MAUI
  • SNMP support for alarms and system monitoring

Application Development

  • Application Programming Interface (API)
  • Computer Telephony Integration (CTI)
  • External Database
  • Host Control Interface

CLASSsm & Billable Features

  • CLASS Features
  • Automatic Call Distributor (ACD)
  • Automated Call Processing (ACP)
  • Broadcast Ringing
  • Caller ID (Name and Number Delivery)
  • Centrex (IP and TDM)
  • Conferences
  • Conference Control
  • Preset, Meet-Me, Progressive
  • Optional Password Protection
  • Loudest Party Talker
  • Firebar
  • Customer-Originated Call Trace
  • Hotlines
  • Single Number Services (Find Me)

Access Solutions

  • Broadband Loop Carrier (BLC)
  • Direct wire 2-wire subscribers
  • GR-303
  • Radio
  • SIP
  • V5.2

Signaling & Protocols

  • A-Law/μ-255 Law PCM Conversion
  • C5/SS5
  • DTMF & RFC 2833
  • E&M
  • GR-303
  • ISDN PRI (4ESS, 5ESS, NI1, DMS100, & Euro)
  • ISDN BRI (5ESS, NI1 & Euro)
  • MF/R1, FG-C&D
  • MFC R2
  • Radio Interface
  • SIP RFC 3261
  • SS7
  • 800 dips via TCAP
  • ANSI SS7 & ITU C7
  • LNP via TCAP
  • T1/E1
  • V5.2


  • Distributed control
  • Lawful Intercept (CALEA): US J-STD-025A & US J-STD-025B
  • PIN Number Authorization
  • Priority Override
  • RADIUS Authentication
  • SRTP
  • TLS
  • User Level Security

Compatible SIP Phones

IP Technology Suite

  • Up to 3,000 registered IP subscribers per shelf
  • SIP Call Controller/Call Manager
  • SIP Trunking
  • Domain Name System (DNS)
  • Dual Stack IP (IPv4, IPv6)
  • Audio Streaming RTP (RFCs 3550, 3551, 3389)
  • Comfort Noise Generation
  • Dynamic Host Configuration Protocol (DHCP) client
  • Echo Cancellation: G.165, G.168 (up to 128ms)
  • Fax over IP (T.38) and
  • Modem over IP (V.150.1)
  • IMS Compatible
  • IP Bandwidth Management
  • Legacy Interface Support
  • Media Gateway
  • MGCP/NCS Line Support (Packetcable 1.5)
  • Network Time Protocol (NTP)
  • QoS: IP Differentiated Services (DiffServ) marking
  • RFC 3261, 3326, 4028
  • Session Description Protocol (SDP) Manipulation
  • Silence Suppression
  • SIP support for CLASS lineside features
  • System CRON Timers
  • Telephony Tones: RFC 4733
  • VLAN Tagging
  • VoIP (SIP standards-based)


  • G.711A&μ (64kbps PCM)
  • G.722.1 & G.722.2 (HD Voice)
  • G.723.1H&L
  • G.726 (16, 24, 32, 40kbps ADPCM)
  • G.729A&B (8kbps CS-ACELP)
  • iLBC
  • RFC4040 (64 kbps)
  • Fax over IP: T.38, Media Gateway Conversion (MGC) & Auto
  • Modem over IP: V.150.1 


  • CALEA: TIA J-STD-025A and J-STD-025B
  • Electromagnetic compatibility: FCC Part 15 Class A
  • Industry Canada CS-03
  • TIA-968-A

Wireless Capabilities

  • Radio Interface (VOX, COR, PTT)
  • Wireless IP Subscribers

Ancillary Products

  • Maintenance and Administration Graphical User Interface (MAUI)
  • Link Command System (LCS): Operator/Directory Assistance

HDX PDF brochures & data sheets

Product Photography

hdx-front-thumb.jpg hdx-msc-thumb.jpg

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