T1 Fold (2KM)
Contents
1. BLACK BOX tenes epe peg SEPTEMBER 1995 MT612A ST MT612AE ST T1 Fold 2KM St SSE SSS SEES SSS SS Ee UIS BON ESO ON HR RE EUSEB ELE CUSTOMER Order toll free in the U S 24 hours 7 A M Monday to midnight Friday 877 877 BBOX SUPPORT FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 INFORMATION Mail order Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com TI FOLD 2KM FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates uses and can radiate radio frequency energy and if not installed and used properly that is in strict accordance with the manufacturer s instructions may cause interference to radio communication It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules which are designed to provide reasonable protection against such interference 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 by2. 3 5 Preparation for Operation After you have set the internal jumpers the T1 Fold 2KM is ready for operation 3 5 1 GROUNDING For your protection the T1 Fold 2KM must always be connected to a properly grounded mains outlet Operation without a proper ground can make this instrument dangerous 3 5 2 POWER CONNECTION Power should be supplied to the T1 Fold through the power attachment arrangement supplied with the unit This is either a wallmount or in line transformer power pack 3 5 3 FIBEROPTICS CONNECTION Two fiberoptic connectors are located on the rear panel marked TX and RX Remove the protective caps from the connectors and store them in a safe place for later use Connect the transmit fiber to the connector marked TX and the receive fiber to the connector marked RX At the remote unit the transmit fiber must be connected to RX and the receive fiber to TX TI FOLD 2KM 3 5 4 T1 CABLE CONNECTION Connect to the DB15 female connector on the rear panel Refer to Appendix A for information on the wiring of the DB15 connector Jumpers W6 7 9 10 14 15 17 and 18 set the electrical characteristics of the 100 DB15 interface See Table 3 1 RD TD TX RX J1 Figure 3 2 T1 Fold 2KM Rear Panel CHAPTER 3 Installation Table 3 1 Internal Jumpers Jumper No Jumper Name Function Possible Settings W11 T1 Sets d
3. the party responsible for compliance could void the user s authority to operate the equipment This digital apparatus does not exceed the Class A limits for radio noise emission f rom digital apparatus set out in the Radio Interference Regulation of Industry Canada Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la classe A prescrites dans le Reglement sur le brouillage radio lectrique publi par Industrie Canada TRADEMARKS USED IN THIS MANUAL AT amp T and ST are registered trademarks of AT amp T Company UL is a registered trademark of Underwriters Laboratories Incorporated Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners TI FOLD 2KM Contents Chapter Page 1 DpectHCAatlODs tont tret ehe at reti vette ES EEE N EEE 1 2 MFO AU CUOM ue EUR VERUS 2 PA GRAECE 2 2 2 System ConsideratiOns dius 3 2 9 T Data Transfer een arenae DEE NEENA 3 PAPA AM T a O 3 9 4 Unpackint m 4 3 2 bite REGUITEMEDIS cire eter mre ene nn o eer ie ee utres 4 2 9 SEINE the CODIISPUratiOTi cue costretto prt 4 3 4 Internal Settings 5 5 D Preparation for reete ter e ninm tere
4. 20 watts 17 VAC ct 0 7 A PSI54E 230 VAC 50 Hz 20 watts 17 VAC ct 0 75 A Size 2 5 H x 8 W x 12 D 6 4 x 20 3 x 30 5 cm Weight 5 5 Ib 9 5 kg 2 Introduction 2 1 Overview The T1 Fold 2KM is a fiberoptic modem for transmission of T1 data 1 544 Mbps over multi mode fiberoptic media It is transparent to 1 framing and can transmit data using any framing pattern protocol with AMI or B8ZS coded signals The Fold converts the electrical signal into an optical signal via an infrared LED light emitting diode transmitter At the opposite end of the fiber the optical signal is converted back into an electrical signal and amplified into the required level Automatic Gain Control AGC circuits are used to accommodate various distances The T1 Fold uses a Phase Locked Loop PLL circuit to recover data and clock from the signal The T1 Fold provides jumper selectable electrical interface options Balanced 100 ohm terminations The 100 O termination is normally used for T1 twisted pair cable 15 connector is provided on the rear panel Internal jumpers enable the input output ports to be floating balanced according to the application Diagnostic and alarm features include an LED status indicator all ones signaling AIS alarm generation and dry contact closure upon link failure The T1 Fold is designed to operate with several different sizes of fiberoptic cable and provides
5. Not installed Not installed Not installed Installed W17 W18 Not installed Not installed Installed Not installed W5 W8 T1 E1 T1 E1 E1 75 T1 E1 W9 W10 4 Operation 4 1 Front Panel Indicators The T1 Fold 2KM has two front panel indicators for convenient status monitoring Power Lights when power is supplied to the T1 Fold 2KM Link Lights when the optical signal is gt 28 dBm 4 2 General Operation After installation the T1 Fold 2KM normally operates unattended Operator intervention is required only when the T1 Fold 2KM is set up for the first time or when the unit must be adapted to new operational requirements that call for changing the internal jumper settings 4 3 Operating Instructions The Fold is turned on as soon as you apply power When power is connected the POWER LED lights and remains lit until you remove power During normal operation the Link LED is on NOTE When you turn on the T1 Fold 2KM the Link LED may be out indicating that other communication equipment is not yet operating or that the optical signal is below 28 dBm The LED will light as soon as all link equipment is operating The Fold is turned off by disconnecting its power Always disconnect the power cable from the mains outlet before you disconnect it from the unit 5 Troubleshooting If a problem arises refer to table below Perform actions listed in the Corrective Meas
6. ata rate to T1 T1 W13 T1 1 544 Mbps T1 W15 Balanced Enables INPUT to be Balanced floating floating W14 Balanced Enables OUTPUT to be Balanced floating floating W12 Fiber all ones In the event of optical signal YES AIS signal loss sends all ones optical transmitted both signaling at 50 ppm to the electrically to remote unit in addition to local unit and the all ones signaling sent optically to the to the local electrical remote unit interface NO AIS signal transmitted elect rically only to the local unit W6 T1 100 Termination Selection 1000 T1 DB15 T1 100 Enable or Disable W17 E1 120 1200 E1 DB15 W18 E1 120 Enable or Disable W5 E1 75 750 E1 BNC 1 75 Enable or Disable W9 T1 E1 E1 75 T1 E1 for DB15 100 or 1202 W10 T1 E1 E1 75 E1 75 for BNC 75Q El is not supported in the current Fold 2KM model TI FOLD 2KM Table 3 2 Typical Applications El is not supported in the current Fold model Typical 11 Unbalanced Application Typical T1 Balanced Application Twisted Pair Factory Default Typical E1 Unbalanced Application Typical E1 Balanced Application Twisted Pair Jumper No Sngl end Balanced Sngl end Balanced Grounded Sngl end Balanced Sngl end Balanced W14 Grounded No Yes No Yes No Yes No W12 Installed Installed Not installed Not installed W6 W7
7. ata regeneration circuit which then applies it to the circuit that drives the electrical interface driving circuit 2 2 2 INTERFACING The T1 interface fully complies with requirements of AT amp T PUB 62411 and 703 Two types of line coding can be used AMI or B8ZS Select the T1 interface by installing jumpers in appropriate positions as shown in Fig 3 1 and Table 3 1 3 Installation 3 1 Unpacking Before unpacking the unit inspect the equipment container Note and report evidence of damage immediately Place the container on a clean flat surface cut all straps and open or remove top Carefully remove the T1 Fold 2KM from the carton and place it on a clean surface Inspect the T1 Fold Contact your supplier immediately if there is any damage Your package should contain one T1 Fold 2KM one power supply PS154 PS154E and this user s manual 3 2 Site Requirements The T1 Fold 2KM is a standalone unit It should be installed within 5 feet 1 5 m of a grounded AC outlet capable of furnishing the rated voltage of the unit 115 or 230 VAC depending on which model you have 3 3 Setting the Configuration The T1 Fold 2KM is configured for operation in various modes by arranging user alterable jumpers on the printed circuit board You won t need to reconfigure the jumpers for typical T1 applications the default settings T1 100 ohm Balanced 1 544 Mbps should work If you need to make or change the setting
8. n the following function has been added for monitoring convenience 6 13 Signal Loss Normally Open Dry Contact Pair Closes on Loss of Link or Power
9. s however follow these steps l Disconnect the power supply from the mains outlet 2 Open the 1 Fold by removing the four screws on the bottom 3 Identify the jumpers see Figure 3 1 4 Install the jumpers in the desired positions refer to Section 3 4 5 Replace the T1 Fold s cover and screw in the four side screws CHAPTER 3 Installation 3 4 Internal Settings Information Before you install the T1 Fold 2KM set the internal jumpers according to your application that is electrical interface The jumpers are located on the T1 Fold board as shown in Figure 3 1 Jumper functions are listed in Table 3 2 The internal jumpers near RD and DBI5 see Figure 3 1 select 100 Q for T1 balanced signals usually applied by the 15 connector a mri ru Figure 3 1 Jumper Locations Jumpers marked with an asterisk are factory default settings CHAPTER 3 Installation Jumper W12 can be set to YES NO When W12 is set to YES and the received optical signal is lost the T1 Fold sends an all ones signal AIS at a nominal frequency of 50 ppm When the W12 fiber all ones jumper is in the NO position the AIS signal is sent only to the electrical interface of the local unit that is to the attached T1 equipment When the fiber all ones jumper is set to YES the AIS optical signal is also sent to the remote unit via the transmit optical link
10. t rot no nere te ape 7 38 1 7 9 5 2 Power Connection eroe coton reto o pee ner 7 3 5 3 Fiberoptics Connection 7 354 T T able 8 2 Operation iecit te Se Oe ERO EIER EAM eir IS kde RE E 11 4 1 FrontPanel Indicators eire eet ener reete 11 4 2 General Operation aieo tne 11 45 Operating InstF CtiOTis serine retro ie cour e Eras 1l De 01 5 dE de ore RUP M 12 Appendix A Functional Interface Specifications 13 1 Specifications Compliance FCC Class A Subpart J of Part 15 CSA UL Speed 1 544 Mbps for 1 Interface Jumper selectable between T1 1000 twisted pair balanced DB15 connector Connectors 1 0815 female 2 ST Optic Launch Power nominal 10 dBm into 100p fiber 14 dBm into 62 5 fiber Receiver Sensitivity nominal 28 dBm Range nominal 100 core fiber 3 km 62 5 core fiber 2 km Operating Wavelength 820 nm Fiber Type Multimode Indicators 2 LEDs 1 Power red and 1 Link green MTBF Approx 100 000 hours MTTR 20 minutes Operating Temperature 32 to 122 F 0 to 50 C Storage Temperature 4 to 158 F 20 to 70 C Humidity 15 to 9096 noncondensing Power 115 10 60 Hz 5 watts max PS154 120 VAC 60 Hz
11. ures column in the order given until the problem is corrected If you continue to have problems call your supplier Symptom Probable Causes Corrective Measures POWER LED No power Make sure that the AC power is is off properly connected Defective unit Check mains fuses Replace the unit Call your supplier LINK LED 15 off Incorrect optical signal level received at the receiver input Or No signal is present at the electrical interface a Check that the electrical interface is connected b Make sure the local and remote units jumpers are set to the ap propriate setting Fig 3 1 Table 3 1 Is the fiberoptic cable properly connected to the RX connector d Make sure that the remote unit power is on its attached TI equipment is sending data and the TX fiberoptic connector is connected properly Measure the optical levels on both ends if possible in order to check the optical link f Replace the faulty T1 Fold 2KM Appendix A Functional Interface Specification Appendix A Functional Interface Specifications The DB15 female connector has standard T1 interfaces The pin allocation is described in the table below Pin No Designation Function 1 Send Data TIP Transmit Data A wire 9 Send Data RING Transmit Data B wire 3 Receive Path TIP Receive Data A wire 11 Receive Path RING Receive Data B wire In additio
12. you with the following features Immunity to electrical interference such as EMI RFI spikes and differential ground loops Protection from sparking and lightning A secure link in hazardous or hostile environments The standard version is supplied with an 820 nm multi mode fiberoptic interface The electrical interface meets requirements of AT amp T PUB 62411 and CCITT G 703 for T1 interfaces The unit comes in a compact standalone case that can be placed on a desk top or shelf CHAPTER 2 Introduction 2 2 System Considerations The T1 Fold 2KM provides a simple and reliable means for transmitting full duplex T1 signals via a fiberoptic media A typical application of the T1 Fold is shown in Figure 2 1 Shielded two Shielded two Fiberoptic twisted pair twisted pair cable cable cable Voice Data Mux Voice Data Mux Figure 2 1 Typical T1 Fold 2KM Application 2 2 1 DATA TRANSFER In the application illustrated in Figure 2 1 each Fold 2KM receives signals which are equalized to overcome electrical link distortion The T1 Fold then converts the T1 signals into an optical signal The optical signal is coupled to the fiberoptic media and transmitted via the optical link to the remote unit A high sensitivity pre amplifier and an AGC Automatic Gain Control circuit enable the remote unit to receive the optical signal The output of the receiver is applied to the clock recovery and d
Download Pdf Manuals
Related Search