CTC Union TRM01 User Manual
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CTC Union TRM01 User Manual

CTC Union TRM01 User Manual

4u (7") high 19" rack fractional t1 concentrator
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Summary of Contents for CTC Union TRM01

  • Page 3: Table Of Contents

    Table of Contents Chapter 1. Introduction …………………………………………... 1 1.1 General …………………………………………………….. 1 1.2 Functional Description ……………………………………. 1 1.3 Technical Specifications …………………………………... 3 1.4 T1 Signal Structure ……………………………………….. 4 1.5 Applications / Capabilities ………………………………… 6 Chapter 2. Installation ……………………………………………. 9 2.1 General …………………………………………………….. 9 2.2 Site Preparation ……………………………………………...
  • Page 4 Table of Contents Chapter 4. Loop Back Testing …………………………………... 23 4.1 General ……………………………………………………... 23 4.2 User Activate Loop Back …………………………………. 23 4.3 T1 Link local digital loop back ……..…………….………. 23 4.4 Data Port local analog loop back ……………….………… 24 4.5 T1 Link remote loop back ………………………………… 24 4.6 BERT local loop back ……………...………………………...

  • Page 5: Chapter 1. Introduction

    Chapter 1. Introduction 1.1 General The TRM-01 is a 4U (7") high 19" Rack, containing multiple T1 CSU/DSUs for Fractional T1 network access. The TRM-01 provides an economic solution in high density T1 installations such as central offices. There are 13 slots available for installation of FT1 Cards (G.703 Fractional T1) into the TRM-01 compact RACK.
  • Page 6 Chapter 1. Introduction The TRM-01 and FT1 Cards fully meet all T1 specifications including ITU-T G.703, G.704, G.706, G.732, and G.823. Each FT1 Card features V.54 diagnostic capabilities for performing local loop back and remote loop back. The operator at either end of the T1 line may test both the FT1 Card and the line in the digital loop back mode.

  • Page 7: Technical Specifications

    Chapter 1. Introduction 1.3 Technical Specifications T1 Link User Data Channels • Framing • Interface Type Unframed/Framed V.35 D4(SF) RS-530 RS-449 X.21 • Bit Rate 1.544Mbps Ethernet 10Base-T • Line Code • I/F Connectors HDB26 female • Line Code B8ZS NRZ (except •...

  • Page 8: T1 Signal Structure

    Chapter 1. Introduction 1.4 T1 Signal Structure The T1 line operates at a nominal rate of 1.544Mbps. The data transferred over the T1 line is organized into frames, with each T1 frame containing 256 bits. The 256 bits are a total of the 24 time slots, each containing eight bits, that carry the data payload.
  • Page 9 Chapter 1. Introduction In the AMI format, “ones” are alternately transmitted as positive and negative pulses, whereas “zeros” are transmitted as a zero voltage level. AMI is not used in most 1.544Mbps transmissions because synchronization loss occurs during long strings of data zeros. B8ZS: Abbreviation for bipolar with eight-zero substitution .

  • Page 10: Applications / Capabilities

    Chapter 1. Introduction 1.5 Applications / Capabilities In the following example, the TRM-01 is installed at an ISP's central office and provides "last mile" access to corporate customers over dedicated T1 transmission lines. The customer site utilizes a single data port CSU/DSU, which could be one of our pack series or standalone units.
  • Page 11 Chapter 1. Introduction The next example utilizes the cascade capability of the FT1 Cards. In this example, multiple FT1 Cards are set to “cascade”. Each card is assigned non- overlapping timeslots of a single T1 line. In cascade mode, the FT1 Card passes unused timeslot data transparently from Rx to Tx, creating a multiplexer effect.
  • Page 12 Chapter 1. Introduction This page left blank intentionally. TRM-01 APR 2000...

  • Page 13: Chapter 2. Installation

    Chapter 2. Installation 2.1 General This chapter explains in detail the requirements and procedures for the installation of the TRM-01 Rack Mount Series T1 Digital Access Unit. 2.2 Site Preparation Install the TRM-01 within reach of an easily accessible grounded AC outlet.

  • Page 14: Electrical Installation

    Chapter 2. Installation 2.4 Electrical Installation 2-4-1. Power connection In the AC model, AC power is supplied to the TRM-01 through a standard IEC 3-prong receptacle, located on the rear of the chassis. In the DC model, DC –48V is connected to the lower terminal block, observing the proper polarity.
  • Page 15 Chapter 2. Installation 2-4-2. Rear panel connectors The FT1 Cards install into the front of the TRM-01 and receive DC power from the back plane or “main board”. The back plane provides both DC power to the T1 Cards and routes signals from the cards to the T1 (CSU) and data port (DSU) connectors accessible at the rear of the TRM-01.

  • Page 16: Power Supply Modules

    Chapter 2. Installation 2.5 Power Supply Modules The Power Supply Modules in the TRM-01 are available in two versions, AC or DC. The AC version supports input voltages of 90 to 250 volts at frequencies of 50 to 60 Hertz. The DC version supports –42 to -54VDC input voltage.

  • Page 17: Chapter 3. Data Modules

    Chapter 3. Data Modules 3.1 Data Module Overview The Data Modules for the TRM-01 are FT1 (fractional T1) Cards which slide into the TRM-01 chassis, and interface with the pack panel “main board”. The back panel provides an interface connection to the FT1 cards for power, T1 connection, data port connection and control logic (for optional SNMP/local management terminal).
  • Page 18 Chapter 3. Data Modules Figure 3-2 : FT1 Card Detail TRM-01 APR 2000...
  • Page 19 Chapter 3. Data Modules The FT1 Card in the TRM-01 uses a common bare PC board. During production, the card assembly is outfitted with the required interface circuitry and firmware for a particular interface type. A check mark is placed in the box as noted in the previous figure (shown with V.35 checked).

  • Page 20: Data Module Led Indicators

    Chapter 3. Data Modules 3.2 Data Module LED Indicators PWR: This green LED should be lit when the chassis is powered and the FT1 Card is seated in the rack slot. TD: This yellow LED will flash when there is transmit data activity from the connected DTE equipment to the FT1 Card.

  • Page 21: Data Module

    Chapter 3. Data Modules 3.3 V.35 Data Module When the TRM-01 is ordered with an TRM01/V35 option, an FT1/V35 card is supplied and an optional V.35 adapter cable may be ordered or assembled according to the following table. The adapter cable follows the pin out standards shown below exactly.

  • Page 22: Rs-530 Data Module

    Chapter 3. Data Modules 3.4 RS-530 Data Module When the TRM-01 is ordered with an TRM01/530 option, an FT1/530(public) card is supplied and an optional RS-530 adapter cable may be ordered or assembled according to the following table. The adapter cable follows the pin out standards shown below exactly.

  • Page 23: Rs-449 Data Module

    Chapter 3. Data Modules 3.5 RS-449 Data Module When the TRM-01 is ordered with an TRM01/449 option, an FT1/530(public) card is supplied and an optional RS-449 adapter cable may be ordered or assembled according to the following table. The adapter cable follows the pin out standards shown below exactly.

  • Page 24: Data Module

    Chapter 3. Data Modules 3.6 X.21 Data Module When the TRM-01 is ordered with an TRM01/X21 option, an FT1/530(public) card is supplied and an optional X.21 adapter cable may be ordered or assembled according to the following table. The adapter cable follows the pin out standards shown below exactly.

  • Page 25: Et10 Ethernet Module

    Chapter 3. Data Modules 3.7 ET10 10Base-T Ethernet Bridge Module When the TRM-01 is ordered with an TRM01/ET10 option, an FT1/ET10 card and HDB26 to RJ-45 adapter are supplied and assembled according to the following table. The FT1/ET10 Card includes an additional “daughter”...
  • Page 26 Chapter 3. Data Modules ET10 : Attach to HUB (1:1) or PC (Crossover) OFF* OFF* OFF* OFF* * factory setting Table 3-6 : ET10 Daughter Board DIP Switch S1 Settings Comment Comment Factory Default Do not change Factory Default Do not change Factory Default Do not change OFF*...

  • Page 27: Chapter 4. Loop Back Testing

    Chapter 4. Loop Back Testing 4.1 General In this chapter we shall explain the detailed functioning of the loop back switches. 4.2 User Activated Loop back The FT1 Card supports the following types of test loop backs. Data Port local analog loop back. T1 link local digital loop back.

  • Page 28: Data Port Local Analog Loop Back

    Chapter 4. Loop Back Testing 4.4 Data port local analog loop back The FT1 Card local analog loop back is established in analog mode as close as possible to the T1 line, to check the satisfactory working of the FT1 Card and the connection between the DTE and FT1 Card.

  • Page 29: Bert Local Loop Back

    Chapter 4. Loop Back Testing 4.6 BERT local loop back For a local test, depress the Loc ana loopbk pushbutton or physically hardwire the T1 link TX to the T1 link RX with coaxial (BNC) cable. Depress the Pattern push-button switch. During BERT testing, the local DTE is disconnected and the DSR line is off.
  • Page 30 Chapter 4. Loop Back Testing This page left blank intentionally TRM-01 APR 2000...

  • Page 31: Chapter 5. Troubleshooting

    Having the proper tools is also important in any troubleshooting endeavor. When troubleshooting T1 connections a transmission analyzer is an invaluable tool in isolating configuration, line or hardware problems. CTC Union's BTM- 10 T1 Transmission Analyzer is an excellent choice. The unit is very portable, battery operated, with built-in keyboard and LCD display.

  • Page 32: Configuration

    Chapter 5. Troubleshooting 5.3 Configuration When physical connections have been confirmed, start looking for configuration problems. Confirm that the proper line code is being used. The FT1 Cards all support AMI and B8ZS line codes. In almost all instances, the line code will be B8ZS.

  • Page 33: Ft1 Card Testing

    Chapter 5. Troubleshooting 5.4 FT1 Card Testing The example given here refers to use of CTC Union's BTM-10 T1 Transmission Analyzer. To test any of the FT1 Cards, connect either an RJ-45 T1 cable or two coaxial cables between the Device Under Test (DUT) and the BTM-10 tester.
  • Page 34 Chapter 5. Troubleshooting If for example the FT1 Card is an FT1/RS530, the tester is connected directly to the RS-530 interface of the data port. The clock on the tester is set to "external". Set up for BERT test and run a pattern to the data port. Depress the Rem loopbk switch on the local unit.
  • Page 35 Chapter 5. Troubleshooting Here's one more test based upon the previous setup. Depress both Pattern switches on each card. Now, each pattern generator is sending to the other card, while each pattern tester is receiving the 511-bit pattern from the other card. The same successful indicators as previous apply.
  • Page 36 Chapter 5. Troubleshooting This page left blank intentionally. TRM-01 APR 2000...

  • Page 37: Appendix A. Dip Switch Setting Tables

    Appendix A. DIP Switch Settings DIP SWITCH FUNCTION DESCRIPTIONS DIPSW FUNCTION COMMENT Time slot 1 to 8 setting See Table A-2 Time slot 9 to 16 setting See Table A-3 Time slot 17 to 24 setting See Table A-4 Line build out setting See Table A-5 Parameter group 1 setting See Table A-6...
  • Page 38 Appendix A. DIP Switch Settings DIPSW3 DIP SW3 STATE FUNCTION COMMENT Time slot 9 disable Time slot 9 enable Time slot 10 disable Time slot 10 enable Time slot 11 disable Time slot 11 enable Time slot 12 disable Time slot 12 enable Time slot 13 disable Time slot 13 enable Time slot 14 disable...
  • Page 39 Appendix A. DIP Switch Settings DIPSW5 DIP SW4 STATE FUNCTION COMMAND -1,-2,-3 OFF OFF OFF 0 to 133 feet / 0dB OFF OFF 133 to 266 feet 266 to 399 feet 399 to 533 feet OFF OFF 533 to 655 feet -7.5 dB -15 dB -22.5 dB...
  • Page 40 Appendix A. DIP Switch Settings DIPSW7 DIP SW7 STATE FUNCTION COMMENT Normal RC timing polarity : Invert RC timing polarity : Normal TC timing polarity : Invert TC timing polarity : Always ON DCD control : Follow RTS DCD control : Disable Multiple (cascade) : Enable...
  • Page 41 Appendix A. DIP Switch Settings This page left blank intentionally. TRM-01 APR 2000...
  • Page 42 notes:...

  • Page 43: Notes

    notes:...
  • Page 44 Technical Inquiry Form TRM-01 MODEL No.: FT1/V.35 FT1/RS-530 FT1/ET10 Please fill in the DIP switches configuration with ' ' marks into the following table. Send it to us by fax, and we will reply to you immediately. Your Setting CTC Suggestion SW NO.
  • Page 48 T1 Access Unit CTC Union Technologies Co., Ltd. Far Eastern Edison Science and Technologies Center (Nei-Hu HI-TEC Park) 6F-3, Lane 360, Nei-Hu Road, Section 1 Nei-Hu, Taipei, Taiwan Phone:(886) 2.2659.1021 (Rep) Fax:(886) 2.2799.1355 E-mail: ctcu@ms2.hinet.net http://www.ctcu.com...

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