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Chapter 4: Operation

724-746-5500 | blackbox.com

Page 46

4.2

Auto-cross (MDIX), Auto-negotiation and Speed-sensing

The RJ-45 ports support auto-cross (MDI or MDI-X) in the

auto-negotiation mode according to the IEEE 802.3u standard. No
crossover cables are needed on RJ-45 port, when connecting the
LPH240A Series to other unmanaged switches, legacy hubs,
managed switches, media-converter etc. Please note that there can
be conditions with managed switches where the switch manager fixes
the port settings via software, and the result of the auto-negotiation is
changed in the managed switch by the manager commands. In such
cases, the 10/100 speed or the F/H mode may be affected, but auto-
cross in the LPH240A switches will still work. The auto-cross function
cannot be disabled.

When an RJ-45 cable connection is made, and each time LINK

is enabled, auto-negotiation takes place (except for legacy products,
which do not have auto-negotiation and which go to the default state
accordingly). The LPH240A Switches advertises its capability for 10 or
100 Mbps speed and F/H duplex mode, and the device at the other end
of the cable should similarly advertise/respond. Both sides will agree to
the speed and mode to be used per the IEEE 802.3u standard.
Depending upon the devices connected, this will result in agreement to
operate at either 10 Mbps or 100Mbps speed, and full- or half-duplex
mode.

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Summary of Contents for LPH240A-H

Page 1: ...witch Use this economical 6 port 10 100 switch which has four 802 3af compliant PoE PSE ports for PoE devices Reduces Network Costs and provides economical solution Operation is plug and play LPH240A H LPH240A P ...

Page 2: ......

Page 3: ...when the equipment is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operat...

Page 4: ...sado únicamente con carritos o pedestales que sean recomendados por el fabricante 7 El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las instrucciones de operación Todo otro servicio deberá ser referido a personal de servicio calificado 9 El apara...

Page 5: ...ser limpiado únicamente de acuerdo a las recomendaciones del fabricante 15 En caso de existir una antena externa deberá ser localizada lejos de las lineas de energia 16 El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de venti...

Page 6: ... of Telcordia Technologies UL is a registered trademark of Underwriters Laboratories Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners We re here to help If you have any questions about your application or our products contact Black Box Tech Support at 724 746 5500 or go to blackbox com and click on Talk to Black Box You ll be live with one o...

Page 7: ...ting option 34 3 5 Power Requirement for LPH240A 48V Edge Switch 35 3 6 Powering the LPH240A with 48VDC power input 36 3 7 LPH240A Series DC powered 48VDC Installation 37 3 8 Connecting Ethernet Media 38 3 8 1 Connecting Twisted Pair 39 3 8 2 Connecting Fiber Optic ST type twist lock 40 3 8 3 Connecting Fiber Optic SC type Snap In 41 3 8 4 Connecting Single Mode Fiber Optic 41 3 8 5 Power Budget C...

Page 8: ...kbox com Page 8 5 TROUBLESHOOTING 50 5 1 Before Calling for Assistance 51 5 2 When Calling for Assistance 52 5 3 Return Material Authorization RMA Procedure 53 5 4 Shipping and Packaging Information 54 APPENDIX A WARRANTY INFORMATION 55 ...

Page 9: ...tween Domains Filter and Forward Rate from 100Mbps ports 148 800 pps max Filtering and Forwarding Rate from 10 Mbps ports 14 880 pps max Processing type Store and Forward non blocking Auto learning 2K address table Address buffer age out time 300 sec Packet buffers memory 128KB dynamically shared on all domains Latency not including packet time 100 to 10 Mbps 5μs 10 to 100Mbps 15μs Path Delay Valu...

Page 10: ...single mode 412 m 1350 ft 100BASE FX full duplex single mode 20 km 65 620 ft Operating Environment LPH240A H 13ºF to 140ºF 25ºC to 60ºC Long term per agency tests UL 40ºF to 185ºF 40ºC to 85ºC Short term per IEC Type tests LPH240A P 40ºF to 167ºF 40ºC to 75ºC Long term per agency tests UL 58ºF to 212ºF 50ºC to 100ºC Short term per IEC Type tests Storage Temperature All models 40ºF to 185ºF 40ºC to...

Page 11: ...n W x 1 7 in D 9 4 cm x 7 6 cm x 4 3 cm Weight all models 9 5 oz 285g Cooling Method Convection on the office model The Hardened H factory floor and Extreme P temperature uncontrolled location models have closed cases to withstand dirt and use special thermal techniques to transfer heat to the outside of the case for cooling ALARM RELAY Terminal Block H and P models only two screw terminals Intern...

Page 12: ...center ve jack Option for 12VDC jack for wall mount only be used to power the LPH240A unit when no PoE devices are attached act as non PoE switch AC POWER SUPPLY using internal IEC320 connection LPH240A X XX models have an standard worldwide AC 100 250 VAC power input via IEC320 male recessed UL listed and surge protected connector Port Connectors RJ 45 Ports supports 100BASE TX and 10BASE T with ...

Page 13: ...ber port only Mounting options Metal mounting clips for panel mounting included DIN Rail mounting option Model DIN RAIL MC2 see Section 3 4 Agency Approvals and Standards Compliance UL Listed UL 60950 cUL CE Emissions meets FCC Part 15 Class A IEC 61850 EMC and Operating Conditions Class C Power Substations IEEE 1613 Env Standard for Electrical Power Substations NEBS L3 and ETSI compliant includin...

Page 14: ...imode SC port non PoE one RJ45 non PoE 48VDC terminal block for power input LPH240A H SSC 48 Same as above except a Singlemode SC replaces the Multimode SC port LPH240A H ST 48 Same as above except a Multimode ST replaces the SC port LPH240A H 2SC 48 6 port Hardened rated PoE 802 3af Power sourcing Edge switch four RJ 45 PoE two Multimode SC port non PoE 48VDC terminal block for power input LPH240...

Page 15: ...mode SC port non PoE one RJ 45 non PoE 48VDC terminal block for power input LPH240A P SSC 48 Same as above except a Single mode SC replaces the Multimode SC port LPH240A P ST 48 Same as above except a Multimode ST replaces the SC port LPH240A P 2SC 48 6 port Extreme rated PoE 802 3af Power sourcing Edge switch four RJ 45 PoE two Multimode SC port non PoE 48VDC terminal block for power input LPH240...

Page 16: ... Multimode SC port non PoE one RJ45 non PoE AC IEC320 connector for power input LPH240A H SSC Same as above except a Single mode SC replaces the Multimode SC port LPH240A H ST Same as above except a Multimode ST replaces the SC port LPH240A H 2SC 6 port Hardened rated PoE 802 3af Power sourcing Edge switch four RJ 45 PoE two Multimode SC port non PoE AC IEC320 connector for power input LPH240A H 2...

Page 17: ... Multimode SC port non PoE one RJ45 non PoE AC IEC320 connector for power input LPH240A P SSC Same as above except a Singlemode SC replaces the Multimode SC port LPH240A P ST Same as above except a Multimode ST replaces the SC port LPH240A P 2SC 6 port Extreme rated PoE 802 3af Power sourcing Edge switch four RJ 45 PoE two Multimode SC port non PoE AC IEC320 connector for power input LPH240A P 2SS...

Page 18: ...Chapter 1 Specifications 724 746 5500 blackbox com Page 18 LPH240A H 48 shown LPH240A H shown ...

Page 19: ... listed below are included This package should contain 1 LPH240A PoE Edge Switch 1 Set of metal clips and screws for secure shelf or wall mounting 1 Installation and User Guide Remove the Hardened Industrial Switch from the shipping container Be sure to keep the shipping container in case you need to ship the unit at a later date If items are missing or damaged contact Black Box Technical Support ...

Page 20: ...E Power source Edge Switch combines standard 802 3af Power over Ethernet PoE with a small heavy duty 4 port PoE ports and 2 100Mb Fiber or 10 100 RJ 45 ports as per the user requirement Using an external 48vdc power source all four of the LPH240A s Ethernet ports can provide Power as well as 10 100 Mb data transmission over the interconnecting Ethernet cables So a single Ethernet twisted pair RJ 4...

Page 21: ... LPH240A is an 802 3af standards compliant way to power and connect a few small Ethernet devices at the edge of a network where AC power is not cost effective to deploy Since PoE is rapidly emerging as an Ethernet option in industrial commercial outdoor and military applications the LPH240A is enabling the efficient deployment of reliable security cameras VoIP and wireless access networking device...

Page 22: ...loor and building control monitoring Temperature Smoke Heat and other environmental sensors Fire alarms Security devices like retinal scanners or fingerprint readers Lighting control Home automation systems The sleek and compact LPH240A featured with special thermal techniques for harsh temperatures and a hardened rugged enclosure provides a multi purpose choice for all PoE device applications The...

Page 23: ...ch port to the PoE unit Also available with standard AC input utilizing a IEC 320 male recessed connector with internal AC DC power supply 2 3 Frame Buffering and Latency The LPH240A Series PoE Edge Switches are store and forward switches Each frame or packet is loaded into the Switch s memory and inspected before forwarding can occur This technique ensures that all forwarded frames are of a valid...

Page 24: ...he port buffer fills up dropped packets result This dynamic buffer allocation provides the capability for the maximum resources of the LPH240A Series unit to be applied to all traffic loads even when the traffic activity is unbalanced across the ports Since the traffic on an operating network is constantly varying in packet density per port and in aggregate density the LPH240A Series Edge Switches...

Page 25: ...ll receiving half duplex ports in order to stop incoming traffic The latency the time the frame spends in the Switch before it is sent along or forwarded to its destination of the LPH240A Series PoE Edge Switches varies with the port speed types The length of the frame is a variable as it is with all store and forward switches For 10 Mb to 10 Mb 10 Mb to 100Mb or 100Mb to 10 Mb forwarding the late...

Page 26: ...point through its RJ 45 ports and provides a convenient cost effective power source The two fiber or copper ports 1 2 is featured with LLL Link Loss Learn and helps in faster recovery for redundant application Reduces Network Costs and provides economical solution LPH240A Series PoE Switches offer the ideal solution to efficiently and inexpensively connect a Twisted Pair and fiber network with 10M...

Page 27: ...le or mounting arrangement whether panel or Din Rail mounted Rugged metal case Industrial grade LPH240A Series have a robust design and are packaged in a rugged sheet metal enclosure to ensure high reliability and durability even when placed in industrial or outdoor applications Qualified to use for temperature un controlled outdoor application The LPH240A Extreme rated versions of Edge Switches h...

Page 28: ...ugh power for 13 15watts on each RJ 45 port The Terminal block for 48V DC input is a range of 46V to 60V DC Hardware operated Alarm terminal block The Alarm contact option on LPH240A enables monitoring for internal power failure and provides extra reliability to the hardened Switch Link Loss Learn feature for faster recovery in redundant network The LLL feature qualifies the Edge switches to activ...

Page 29: ...H240A Series allows it to be easily installed in almost any location A Velcro strip may be used for mounting the unit on a vertical surface such as a wall or cabinet or for securing the unit on a table top or shelf Alternatively metal mounting clips and screws are included for a rugged and secure mounting in any orientation Installation of the LPH240A Series PoE Edge Switch is a simple procedure T...

Page 30: ...Chapter 3 Installation 724 746 5500 blackbox com Page 30 Fig 3 1a LPH240A x 48VDC 48V model ...

Page 31: ...Chapter 3 Installation 724 746 5500 blackbox com Page 31 Fig 3 1b LPH240A x AC model ...

Page 32: ...es of the LE1505 RACK are specific to the LPH240A products and will not permit other models to be properly mounted In a typical installation the LE1505 RACK 19 rack mount tray will hold a few three to eight LPH240A Series Switches with their power supplies plugged into power strips not included in the rear area of the tray Metal mounting screws in the bottom front hold the Switches firmly in place...

Page 33: ...output and supporting up to 10 Switches for LH1505P RACK The side view above is an example of an installation of the model LH1505P RACK 19 rack mount tray holding a few Switches each with their power input plugged into the built in common AC power supply in the rear area of the tray PS units that come with the MC s are not used Metal mounting screws in the bottom front hold each of the media conve...

Page 34: ... Switches designed for use in Factory Floor Industrial Ethernet environments are also available for DIN Rail mounting in an enclosure having DIN Rails The metal DIN Rail mounting hardware is optional and needs to be ordered as a separate item DIN Rail bracket pn DIN RAIL MC2 LPH240A H 48V LPH240A H ...

Page 35: ...ly be used to power the LPH240A unit when no PoE devices are attached The device will not function as PoE Switch while powered up via 12VDC power but as a normal non PoE Switch POWER OUTPUT PoE available on all four RJ 45 ports via Ethernet twisted pair cabling on port pins using the data pair 1 2 3 6 PoE 802 3af Power Consumption 66 watts max 15 4W max port PoE Ports Output voltage 46 to 57 VDC O...

Page 36: ...rnal DC power supply and has built in screw terminals for secure attachment of the power input leads The three DC power input terminal block choices are for use with 48VDC power Where an AC power adaptor is used DC is supplied via the jack Power input from the DC terminal block and the jack may be connected simultaneously for power input redundancy ...

Page 37: ...nals may be grounded by the user if desired The chassis is earth or ground GND The connection procedure is straightforward Simply insert the DC leads to the LPH240A power terminals positive and negative screws The use of Ground GND optional it connects to the LPH240A chassis Ensure that each lead is securely tightened from the top as shown on above picture with arrow NOTE Always use a voltmeter to...

Page 38: ...25 microns cabling can be used whereas for single mode 9 125 microns cabling should be used Fiber cabling supports much longer cable distance and higher bandwidths as compared to copper wiring Media IEEE Standard Connector Twisted Pair CAT 3 or 5 10BASE T RJ 45 Twisted Pair CAT 5 100BASE TX RJ 45 Fiber Multi mode 100BASE FX ST SC Fiber Single mode 100BASE FX SC NOTE It is recommended that high qua...

Page 39: ...connector of the port Note that even though the connector is shielded either unshielded or shielded cables and wiring may be used 2 Connect the other end of the cable to the corresponding device 3 Use the LINK LED to ensure proper connectivity by noting that the LED will be illuminated when the unit is powered and proper connection is established If this does not help ensure that the cable is conn...

Page 40: ...ptic cable is coded using color bands at regular intervals you must use the color coded strand on the associated ports at each end of the fiber optic segment 3 Connect the Transmit TX port light colored post on the Fiber port to the Receive RX port of the remote device Begin with the color coded strand of the cable for this first TX to RX connection 4 Connect the Receive RX port dark colored post ...

Page 41: ...ecures 3 8 4 Connecting Single Mode Fiber Optic When using single mode fiber cable be sure to use single mode fiber port connectors Single mode fiber cable has a smaller diameter than multi mode fiber cable 9 125 microns for single mode 50 125 or 62 5 125 microns for multi mode where xx xx are the diameters of the core and the core plus the cladding respectively Single mode fiber allows full bandw...

Page 42: ... aging 1dB for insertion loss Worst case distance Worst case OPB in dB Cable Loss in dB Km where the Cable Loss for 62 5 125 and 50 125μm m m is 2 8dB km and the Cable Loss for 100 140 Multi mode is 3 3 dB km and the Cable Loss for 9 125 Single mode is 0 5 dB km Note The use of either multi mode or single mode fiber to operate at 100Mbps speed over long distances i e over approx 400 meters can be ...

Page 43: ...rds which support Auto Negotiation and the Fast Link Pulse FLP coding for the 100BASE TX signaling system When connecting a NIC to the LPH240A Series it may be necessary to reload the NIC drivers on the user device if the NIC has been communicating with a protocol other than 100BASE TX such as 10BASE T When 100Mb operation is agreed and in use the 10 100 LED is illuminated steady ON and OFF if 10 ...

Page 44: ...for mode and speed and auto cross for plug polarity See Section 4 2 When the connected device is 10 Mbps the LPH240A obeys all the rules of 10 Mbps Ethernet configurations The 10 Mbps users can communicate with 100Mbps users as well as other 10 Mbps users through the switch Similarly the 100Mbps traffic obeys the rules of 100Mbps Ethernet and can communicate with 10 Mb and 100Mb users LPH240A Seri...

Page 45: ...r maintaining the operation of the network such as occasional multi cast packets are forwarded to all ports The LPH240A Series Edge Switches operate in the store and forward switching mode which eliminates bad packets and enables peak performance to be achieved when there is heavy traffic on the network Switching Address Learning The LPH240A Series units have address table capacity of 2K node addr...

Page 46: ...he manager commands In such cases the 10 100 speed or the F H mode may be affected but auto cross in the LPH240A switches will still work The auto cross function cannot be disabled When an RJ 45 cable connection is made and each time LINK is enabled auto negotiation takes place except for legacy products which do not have auto negotiation and which go to the default state accordingly The LPH240A S...

Page 47: ... The Link ports are also represented by LA1 LA2 LA3 LA6 Steady On or steady Off indicates no Receive Activity 10 100 Steady ON for 100Mb speed OFF for 10Mb speed per port copper ports F H FH1 FH2 Steady ON for Full duplex F D mode OFF for Half duplex H D mode per port For fiber port only NOTE The port 1 and 2 is being assigned for copper or fiber port for different models On all copper 10 100 port...

Page 48: ...onnection is in the same panel The NC Alarm Contact is held close when there is power on the main board inside of the LPH240A This provides a Hardware operated Alarm because the NC contacts will open when internal power is lost either from an external power down condition or by the failure of the power supply inside of the LPH240A Switch Useful info about Alarm Contacts in LPH240A 1 Two position t...

Page 49: ...Chapter 4 Operation 724 746 5500 blackbox com Page 49 Alarm terminal locations LPH240A 48V model LPH240A AC model ...

Page 50: ...ight forward and is discussed in Section 4 Should problems develop during installation or operation this section is intended to help locate identify and correct these types of problems Please follow the suggestions listed below prior to contacting your supplier However if you are unsure of the procedures described in this section or if the LPH240A Switch is not performing as expected do not attemp...

Page 51: ...some way impaired during installation About 90 of network downtime can be attributed to wiring and connector problems 3 If the problem is isolated to a network device other than the LPH240A Switch product it is recommended that the problem device is replaced with a known good device Verify whether or not the problem is corrected If not go to Step 4 below If the problem is corrected the LPH240A Swi...

Page 52: ... when used appears to create the problem 2 An accurate list of Black Box product model s involved with serial number s Include the date s that you purchased the products from your supplier 3 It is useful to include other network equipment models and related hardware including personal computers workstations terminals and printers plus the various network media types being used 4 A record of change...

Page 53: ...es Order Number Date of installation Failure symptoms including a full description of the problem Black Box will carefully test and evaluate all returned products will repair products that are under warranty at no charge and will return the warranty repaired units to the sender with shipping charges prepaid see Warranty Information Appendix A for complete details However if the problem or conditio...

Page 54: ...ubble wrap plastic sheet or bag for shipping protection You may retain all connectors and this Installation Guide CAUTION Do not pack the unit in Styrofoam popcorn type packing material This material may cause electro static shock damage to the unit 2 Clearly mark the Return Material Authorization RMA number on the outside of the shipping container 3 Black Box is not responsible for your return sh...

Page 55: ...lace components in the products that prove to be defective at no charge other than shipping and handling provided that the product is returned pre paid to Black Box This warranty will not be effective if in the opinion of Black Box the product has been damaged by misuse misapplication or as a result of service or modification other than by Black Box Black Box reserves the right to make a charge fo...

Page 56: ...LPH240A rev 1 ...

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