Résumé du contenu de la page N° 1
DSL
DS1
SF
ESF
(GRN)
(YEL)
AMI
B8ZS
(GRN)
(YEL)
LBK
LOC
L
B
K
REM
FNID
1245201L1
R
S
2
3
2
TX
M
O
N
RX
Section 61245201L1-5C
Issue 3, September 1999
CLEI Code: NCDIFBH4 _ _
FNID and T200 FNID
Fractional T1 Network Interface Device
Installation and Maintenance
CONTENTS
1. GENERAL ............................................................................ 1
2. INSTALLATION .................................................................. 2
3. CONNECTIONS..........................................
Résumé du contenu de la page N° 2
2. INSTALLATION With the exception of the physical dimensions of the units, the FNID and T200 FNID units are functionally identical. The FNID terminates local loop DSL signals originating from the Central Office (CO) unit and transforms the DSL signal into fractional T1 C A U T I O N ! signals to be delivered to the customer. SUBJECT TO ELECTROSTATIC DAMAGE OR DECREASE IN RELIABILITY. HANDLING PRECAUTIONS REQUIRED. The DSL local loop operates over a single twisted pair. The FNID communicates
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Table A. Front Panel Functions Indicator Description DSL ................. Indicates five possible states of the quality of the DSL signal Off ........................ No synchronization of FT1 DP and FNID -7 Red........................ Poor signal quality (≥10 BER) -7 Yellow .................. Marginal signal quality (≤2 dB margin above 10 BER) -7 Green .................... Good signal quality (≤2 dB margin above 10 BER) Blinking ................ An error detected on the loop will cause this L
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4. DSL SYSTEM TESTING 5. CONTROL PORT OPERATION The ADTRAN DSL system provides extensive ability The FNID provides a faceplate-mounted DB9 to monitor the status and performance of the DS1 connector that supplies an RS-232 interface for signals and DSL loop signals. The front panel LEDs connection to a controlling terminal. The pinout of on the FNID are explained in subsection 2 of this the DB9 is illustrated in Figure 4. practice. Additional testing features are described in this section
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Table C. Definition of Screen Abbreviations Abbreviation Definition ES ......................... Errored seconds DS1 (SF) ....... Second in which a BPV or frame bit error occurs DS1 (ESF) .... Second in which a BPV or CRC error occurs DSL .............. Second in which a CRC error occurs SES ....................... Severely errored seconds DS1 (SF) ....... Second in which 1554 BPVs or 8 frame bit errors occur DS1 (ESF) .... Second in which 1544 BPVs or 320 CRC errors occur DSL .............. Se
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A measure of signal quality for each HDSL loop is displayed in graphic form on the bottom right and left of the screen. The measure is from 0 (poor signal quality) to 9 (excellent signal quality). Guidelines for interpreting the indicators are: -7 0 Noise margin is ≤ 0 dB (≈ 10 BER) -7 1-8 Margin measurement above 10 BER in dB -7Ê 9 Margin is ≥ 9 dB (excellent quality) above 10 BER Predicting performance based upon signal quality varies with each loop. Generally, a noise margin of 0 or higher
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ADTRAN 901 Explorer Boulevard Huntsville, Alabama 35806-2807 For Information or Technical Support, Normal Support Hours ( 7am - 7pm CST ) or Emergency Support Hours ( 7x24 ) Voice Toll Free: 800.726.8663 Fax: 256.963.6217 Voice: 256.963.8100 Internet: www.adtran.com —————————————————————————————--------------------------------------
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FT1-DP CURRENT SYSTEM STATUS FNID NETWORK (DSL) ELAPSED TIME 00:08:18 CUSTOMER (DSL) ---------------------- ----------------- 00 dB <- LOSS -> 00 dB NO <- SYNC -> NO 000/00000 <- ES 15M/24H -> 000/00000 000/00000 <- SES 15M/24H -> 000/0000
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LOOPBACK OPTIONS FT1-DP FNID _____ _____ | | | | | | | | —-->| | | |<—- | | | | NET | |<===========================>| | CUST | | | | <—--| | | |—> | | |
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PROVISIONING ___________________________________________________ ______________________ | | | | PROVISIONS CURRENT SETTINGS | HARDWARE SETTINGS | | ------------------------------------------ | ----------------- | | 1. DS1 (FNID) LINE CODE = B8ZS | B8ZS | | 2. DS1 (FNID) FRAMING = ESF | ESF | | 3. DS1 (FNID) TX L
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6. DSL DEPLOYMENT GUIDELINES Recommended maximum local loop loss information for PIC cable at 70°F, 135Ω, resistive termination is The ADTRAN FT1 DSL system is designed to provided in Table D. provide Fractional DS1-based services over loops designed to comply with Carrier Service Area (CSA) Table D. Loop Insertion Loss Data guidelines. CSA deployment guidelines are given below. Frequency (Hz) Maximum Loss (dB) 1. All loops are non-loaded only. 3,000 .......................... 12.0 2. For
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7. TROUBLESHOOTING PROCEDURES Return Material Authorization (RMA) is required prior to returning equipment to ADTRAN. ADTRAN Table E is a troubleshooting guide for the FNID. does not recommend that repairs be performed in the 8. MAINTENANCE field. The ADTRAN FNID requires no routine maintenance. For service, RMA requests, or further information, In case of equipment malfunction, use the faceplate contact one of the following numbers: Bantam jack connectors to help locate the source of the pr
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Table F. FNID Unit Specifications Loop Interface: Modulation Type ................................................. 2B1Q Mode .................................................................... Full Duplex, Echo Cancelling Number of Pairs .................................................. One Bit Rate ................................................................ 784 kbps Baud Rate ............................................................ 392K baud Service Range ...........................
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Appendix A FT1 Loopbacks 1. GENERAL back to the network. The FT1 DP CPE loopback This Appendix is an overall reference to the loopback loops the FT1 signal back to the customer. capabilities of the ADTRAN Fractional T1 system. The FT1 DP network loopback is a digital loopback Included in this Appendix is a description of the FT1 toward the CO (see Figure A-2). This loopback is loopbacks and the methods for activating the FT1 initiated by the OCU latching loopback command loopbacks. (N1010101)
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There is one loopback available to the FT1 Repeaters. loopback is initiated by the DDS latching loopback The FT1 Repeater Network loopback is a digital code for NEI Position 1 (N1000001) for a loopback toward the CO as shown in Figure A-4. The non-repeatered loop, or NEI Position 2 (N1000001) loopbacks are initiated by the DDS latching loopback for a single repeater loop or by NEI Position 3 codes for NEI Position 1 (N1000001) for FT1 #1 or (N1000001) for a two repeater loop; by the craft NEI
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3. LOOPBACK ACTIVATION/DEACTIVATION Latching loopbacks for the FT1 system are activated by transmitting the following latching loopback This section describes loopback activation and deactivation methods for the ADTRAN Fractional T1 sequence in the primary DS0 of the FT1 system: system. Loopback activation and deactivation is A.Minimum of 35 transition in progress (TIP) bytes controlled with the push-button located on the front (N0111010). panel, through craft interface, or latching loopback B
