Overview Plug-in Modules Specifications Product Photography

The SLICE is a small, self-contained switching system, designed to serve as an integrated communications platform, providing a  flexible, portable and reliable Class 4/5 switch in a single, 1U platform. This compact switching system has the power, capability, and simplicity of REDCOM’s High Density Exchange (HDX) in a self-contained, rack-mountable package. Weighing less than 15 pounds, the SLICE is a REDCOM switch in a 1U (1.75 in./4.45 cm) platform that is easy to install in standard 19 inch (48 cm) equipment racks, and is ideal for small stand-alone or remote applications.

With the SLICE, you can service a full spectrum of switching system sizes. A single 1U unit provides 24 analog line circuits, 4 BRI-S line circuits, 2 digital spans (E1/T1), and integrated modular jacks (RJ-11, RJ-45). The SLICE is a completely integrated switching system that can be configured as a public end/tandem office or as a private network node element.

The SLICE has extensive capabilities for both public and private network settings including specialized tandem features ideal for Power Line Carrier applications. The SLICE  provides both domestic and typical international gateway functions, including the capability to perform interface and protocol conversion between U.S. and international standards. Two rear-accessible positions for interface modules on the SLICE, allow either position to be equipped with one of three hot-swappable modules.

Multi-use, wide adoption

The SLICE has been widely adopted by the central office market, private network developers, government and defense users, and emergency response agencies worldwide. Due to its compact size and low power consumption, the SLICE is particularly suited to distributed networks such as those employed by oil platforms, rail and utility networks, and shipboard communications.  The SLICE has a full suite of business features including ISDN and extensive conferencing in order to meet the needs of the most demanding users. Multiple sites may be seamlessly interconnected with REDCOM’s advanced ClusterNet™ technology, which connects multiple SLICE units allowing them to function as one integrated system.

Revenue generation

As a fully functional public exchange, the SLICE provides modern services and revenue-generating features in a small footprint. Replacing existing multiplexers with the SLICE yields enhanced services to subscribers, while retaining the ability to allocate limited bandwidth. SLICE switches can also be connected together for greater capacity. For instance, a 48-subscriber exchange comprised of two integrated SLICE switches can measure as little as 3.4 inches (8.8 cm) high. In addition, when used in conjunction with the REDCOM HDX, the SLICE provides a powerful host/remote combination.

Low maintenance

The SLICE user interface is identical to other REDCOM products, such as the HDX, thereby reducing training costs for existing customers. Installation and updates are simple and spares inventory is minimal, as is routine maintenance. Because of its unique design, the SLICE allows for easy firmware upgrades and remote database administration. Line and cooling modules are field-replaceable making installation and service a snap.


In conjunction with the REDCOM HDX, the SLICE® provides a powerful Host/Remote combination. A single HDX shelf can coordinate multiple remote SLICE®s operating in low density locations.

Interchangeable plug-in modules for REDCOM SLICE

The SLICE has two rear-accessible positions for interface modules. Either position can be equipped with your choice of interface modules. These modules can be replaced in the field with power applied.

12-Port Line Module


12 Loop Lines

  • DTMF receivers & caller-ID senders & echo cancellers.
  • 24 or 48 volt loop battery (auto-select).
  • Meets both ANSI & ETSI standards.
  • 1900 Ω Loop

2 ISDN BRI-S (2B+D) Lines

  • Meets both ANSI & ETSI standards.

1 Test Access Jack


24-Port Line Module


24 Loop Lines

  • DTMF receivers & caller-ID senders & echo cancellers
  • 24 or 48 volt loop battery (auto-select)
  • Meets both ANSI & ETSI standards
  • 1200/1900 Ω Loop

1 Test Access Jack

Analog Trunk (Magneto) Module


10 Loop Lines

  • DTMF receivers & caller-ID senders & echo cancellers.
  • 24 or 48 volt loop battery (auto-select).
  • Meets both ANSI & ETSI standards.
  • 1900 Ω Loop

2 ISDN BRI-S (2B+D) Lines

  • Meets both ANSI & ETSI standards.

2 E&M/SF Trunks

  • Software-selected per module to operate in E&M or SF mode.

2 GSRD/LSRD Trunks

  • Software-selected per module to operate in GSRD or LSRD mode.

Multi-E1/T1 Module


4 E1/T1 Spans, each providing:

  • Software-selectable per span as E1/T1
  • 100 ohm T1 interface or 120 ohm E1 interface via an RJ-45 connector
  • Independent alarm and loopback indicators for each span
  • Software controlled clock synchronization
  • Can be provisioned as a fractional E1/T1
  • 4 general-purpose Digital Signal Processors (DSPs): DTMF, MF/R1, MFC R2, Echo Cancellation
  • Onboard support for Primary Rate

Radio Interface Module


  • Audio Levels: Mic or 600 Ω with additional gain/loss controls
  • Outgoing key methods:PTT, VOX, DTMF, COR,Permanent
  • Incoming key methods:COR or VOX, External PTT
  • Administrable voice delay on transmit (allows for preambles and for scanners to lock to a channel)
  • Half-Duplex or FullDuplex operation
  • Secure Modes of Operation
  • External PTT, Voice andVOX output indicators
  • External Speaker outputsand remote dial-up monitoring (listen only)
  • Provisional tones: new user alert, End of Transmission, End of Reception
  • Echo Cancellers

Secure Device Module


  • Designed to work with Sectéra® Wireline Terminal (Type 1) and TalkSECURE™ (non-Type 1) devices
  • Two HD-26 connectors per module
  • Separate audio and call control data to each secure device
  • Contains four ports designed to interface with up to four secure devices
  • Each port consists of an RS-232 interface and a two-wire audio interface that can be configured as ground or loop start
  • Supports non-secure trunk functionality

SLICE Specifications


  • Height: 1U 1.75 in / 4.4 cm
  • Width: 17.5 in / 44.5 cm
  • Depth: 17 in / 43 cm
  • Weight: Less than 15 lbs / 6.5 kg
  • Mounting: 19" rack mount; wall


  • Conferencing
  • CLASSSM Announcements
  • Signaling: DTMF, MF/R1, MFC R2, ISDN
  • Computer Telephony Integration (CTI)
  • Lawful Intercept (CALEA)
  • International Gateway
  • ClusterNet™


  • 36 ccs (1 Erlang) per port (non-blocking)



  • Up to 6 software-selectable E1/T1 digital spans (with MET Module)
  • 24 analog line circuits
  • 4 ISDN BRI-S
  • 2 RS-232 10/100 Ethernet ports for administration
  • Dual PCMCIA for program update & database backup


  • - 48 VDC
  • AC power supply (optional)


  • 32°-122º F (0º-50º C) ambient
  • 5%-90% relative humidity (non-condensing)

Product Photography

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