“redundant twister”™ “redundant twister”“ TX RX TX TM 2731 RX AT AT AT SW LK 100BASE-TX/FX LK LK A RESET B SECONDARY PRIMARY MAIN PWR “redundant twister”“ TX RX TX TM 2731 RX AT AT AT SW LK 100BASE-TX/FX LK LK A RESET B SM (LH) SECONDARY SM (LH) PRIMARY MAIN PWR “redundant twister”“ TX RX TX TM 2731 RX AT AT AT SW LK 100BASE-TX/FX LK LK A RESET B SM (ELH) SECONDARY SM (ELH) PRIMARY MAIN PWR “redundant twister”“ AT TX RX AT TX RX TM 2731 AT A RE
Metrobility “redundant twister”™ Standalone Units 10Mbps 2711-11 ______ 100Mbps 2731-11 ______ 2731-13 ______ 2731-14 ______ 2731-15 ______ 2731-17 ______ 2731-1J ______ RJ-45 to redundant RJ-45 RJ-45 to redundant RJ-45 RJ-45 to redundant FX multimode SC RJ-45 to redundant FX singlemode SC RJ-45 to redundant FX multimode ST RJ-45 to redundant FX singlemode SC (40km) RJ-45 to redundant FX singlemode SC (100km) Lancast® Intelligent “redundant twister” Modules 10Mbps 7711-11-75 ___ RJ-45 to redundant RJ-45 7
Table of Contents “redundant twister” Installation & User Guide Overview ..................................................................................................................... 5 Installation Guide ....................................................................................................... 7 STEP 1: Unpack the “redundant twister” .................................................... 7 STEP 2: Choose an Appropriate Location ..................................................
Overview The Metrobility “redundant twister” offers the resiliency of data link redundancy to ensure network integrity with no down time. This link duplication provides the nonstop networking capability essential for high priority traffic and mission-critical applications. The “redundant twister” is a 100BASE-TX to TX/FX or 10BASE-T to 10BASE-T device that provides full redundant data paths.
The “redundant twister” is available in several different models. These models each contain a MAIN port, a PRIMARY port and a SECONDARY port. Redundancy is provided between the PRIMARY and SECONDARY ports.
Installation Guide Follow the simple steps outlined in this section of the guide to install and start using your Metrobility “redundant twister”. 1 Unpack the “redundant twister” Check that the following components have been included: • “redundant twister” 2711 or 2731 • Two (2) 12V Power Supplies • Four (4) Rubber Feet Your order has been provided with the safest possible packaging, but shipping damage does occasionally occur.
A set of DIP switches, located on the back panel, provides user-selectable configurability options for several modes of operation. Refer to the table on the following pages for the proper setting of the DIP switches.
2731-XX and 2711-11: The DIP switches are marked on the back panel and can be set for the following operational functions. Switch Name Position TX BOTH UP Operation Transmits data on both the PRIMARY and SECONDARY ports simultaneously. DOWN Transmits data on the active port only. (default) AUTO REVERT UP Active port automatically reverts back to the PRIMARY port when the primary link is reestablished.
2711-11 Only: The 2711-11 provides two additional DIP switches which are described in the following table. Switch Name Position * LLCF UP Operation Link Loss Carry Forward is enabled. DOWN Link Loss Carry Forward is disabled. (default) RED MODE UP Operates in Dynamic Recovery Mode (DRM). If (default) the PRIMARY link fails, the SECONDARY port becomes active. Refer to the description of the AUTO switch. DOWN Operates in Network Select Mode (NSM).
Set the MDI-II/MDI-X Switches (2711-11 only) Next to each RJ-45 connector is a small push button switch used to implement the transmit and receive crossover functionality for that particular port. The position of this switch connects the transmit and receive signal pairs in either a straight through or crossover configuration.
4 Connect to the Network A total of three connections must be made on the front panel when connecting the “redundant twister” media converter to the network. Connect to the MAIN port. • Each “redundant twister” provides one RJ-45 jack for 10BASE-T connections that supports a maximum segment length of 100m Category 3 or 5 twisted-pair; or one RJ-45 jack for 100BASE-TX connections that support a maximum segment length of 100m of Category 5 twisted-pair. Connect to the PRIMARY port.
2731-XX 100BASE-TX connections: • When connecting a “redundant twister” 2731 to another device that is internally wired straight through, use a crossover cable. • When connecting a “redundant twister” 2731 to a device that is internally wired crossed over, use a straight through cable. • If you do not know the internal wiring configuration of the other device’s RJ-45 port, consult the product documentation.
5 Apply Power to the “redundant twister” Power is provided to the “redundant twister” from the desktop, universal input, switching power modules. Each universal power supply module provides a DC jack for connection of the desktop switching power supply module. The power modules are equipped with S760 hollow-type plugs and standard IEC 320-type AC power receptacles.
Upon receiving power, the “redundant twister” goes into normal operation mode and automatically provides the appropriate signal conversion between the connected network segments. Use the individual Link (LK) LEDs on the front panel to verify correct segment connectivity. Refer to the section titled “LED Operation” in the User Guide section of this manual for more information.
Installation Guide
User Guide This section contains more detailed user information regarding the operating features of your “redundant twister”. LED Operation All LEDs are located on the front panel. These include SW, PWR A & B, SECONDARY, LK and AT LEDs. There are separate LK and AT LEDs for each of the three ports (MAIN, PRIMARY and SECONDARY). Refer to the table below for reference.
Reset Push Button A small RESET push button is located on the front panel of the “redundant twister”. When used in conjunction with the unit’s SW and SECONDARY LEDs, and the AUTO DIP switch setting, this push button allows a network administrator to effectively maintain or troubleshoot a PRIMARY link connection. Because of its small size and recessed placement within the front panel, press the RESET push button with the tip of a pointed object. Pushing and holding the RESET push button has no effect.
Link Loss Carry Forward (LLCF) The “redundant twister” 2711-11 has been designed with a LLCF function for troubleshooting a remote connection. The unit is shipped with the LLCF disabled. When LLCF is enabled, the twisted-pair ports on the “redundant twister” do not transmit a link signal until they receive a link signal from the opposite port.
Back-to-Back Application A typical application of the “redundant twister” is to use them in pairs to extend a network’s reach between two remote devices. In the back-to-back setup, both primary ports are linked to each other and both secondary ports are linked as shown in the figure below.
Topology Solutions Server Cluster A Server Cluster B Servers with 100Mbps NICs Main Link A Main Link B “redundant twister” Secondary Link A Primary Link B “redundant twister” Primary Link A Secondary Link B 100Mbps Switch 100Mbps Switch Enterprise Switch Twisted-pair Links Primary Link A Primary Link B Secondary Link A Secondary Link B Enterprise Metrobility “redundant twister” 21
Technical Specifications Data Rate 2711-11 Half duplex _______________________________________________ 10Mbps Full duplex ________________________________________________ 20Mbps 2731-XX Half duplex ______________________________________________ 100Mbps Full duplex _______________________________________________ 200Mbps 10Mbps Twisted-Pair Interface (2711-11) Connector _____________________________________ Shielded RJ-45, 8-pin jack Impedance ___________________________________________ 100 Ohms nominal Signa
100Mbps Singlemode Fiber Optic Interface (2731-XX) Connector ________________________________________________________ SC RX Input Sensitivity _______________________________ -31 dBm peak minimum Output Power ______________________________ -8 dBm to -15 dBm (9/125 µm) Supported Link Length ______________________________ up to 15km full duplex Cable Type _________________________ 8.3/125, 8.
Straight RJ-45 Twisted-Pair Cables COLOR •SIGNAL•PIN RX+ TX— TX+ DO NOT COLOR •SIGNAL•PIN RX— RX+ TX— TX+ 8 7 6 5 4 3 2 1 CABLE Brown Brown Stripe Green Blue Stripe Blue Green Stripe Orange Orange Stripe H Locking Tab on connector is facing away. RX— 8 7 6 5 4 3 2 1 E PATC US Brown Brown Stripe Green Blue Stripe Blue Green Stripe Orange Orange Stripe NOTE: Wire colors are straight through.
Product Safety, EMC and Compliance Statements This equipment complies with the following requirements: • UL • CSA • EN60950 (safety) • FCC Part 15, Class A • EN55022 Class A (emissions) • EN55024: 1998 (immunity) • IEEE 802.3/802.3u • IEC 825-1 Classification • Class 1 Laser Product This product shall be handled, stored and disposed of in accordance with all governing and applicable safety and environmental regulatory agency requirements.
Warranty and Servicing Three-Year Warranty for Metrobility “redundant twister” Metrobility Optical Systems, Inc. warrants that every “redundant twister” will be free from defects in material and workmanship for a period of THREE YEARS. This warranty covers the original user only and is not transferable. Should the unit fail at any time during this warranty period, Metrobility will, at its sole discretion, replace, repair, or refund the purchase price of the product.
Metrobility “redundant twister” 27
25 Manchester Street, Merrimack, NH 03054 USA tel: 1.603.880.1833 • fax: 1.603.594.2887 www.metrobility.
