Instruction/ maintenance manual of the product 2701/B Patton electronic
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USER MANUAL MODEL 2701/B, C, D G.703/G.704 NTU with EIA-530, V .35, X.21 Interfaces SALES OFFICE (301) 975-1000 TECHNICAL SUPPOR T (301) 975-1007 P ar t# 07M2701/X Doc# 086101U Rev .
2 CONTENTS 1.0 Warranty Information ................................................................. 4 1.1 Radio and TV Interference ............................................................ 4 1.2 CE Notice ........................................
3 A.5 Line Framing ............................................................................... 21 A.6 CRC-4 Multiframing .................................................................... 21 A.7 Clocking .........................................
4 1.0 W ARRANTY INFORMATION P atton Electronics w arrants all Model 2701/I components to be free from def ects, and will—at our option—repair or replace the product should it f ail within one year from the first date of shipment.
5 1.3 SERVICE All warranty and non-w arranty repairs must be retur ned freight prepaid and insured to P atton Electronics. All retur ns must hav e a Retur n Materi- als A uthorization number on the outside of the shipping container .
6 2.0 GENERAL INFORMATION Thank you f or your purchase of this P atton Electronics product. This product has been thoroughly inspected and tested and is warranted f or One Y ear par ts and labor .
7 3.0 CONFIGURATION The Model 2701 f eatures configuration capability via hardware DIP s witches. This section describes all possible DIP s witch configurations of the Model 2701. 3.1 DIP SWITCH CONFIGURATION The Model 2701 has two sets of internal DIP switches that allo w configu- ration f or a wide range of applications.
8 Switch SW1-1 thr ough SW1-5 A detailed description of each switch (SW1-1 through SW1-5) setting f ol- lows the summary table below . T able 1: Switch Set 1 Summary T able SW1 SW2 SW3 SW4 SW5 Speed O.
9 Note When the data rate is set to 2.048Mb/s, the unit is f orced into G.703 mode, and it transmits user data on all 32 time-lots . There is no framing inf or mation; theref ore, the CRC4 MF (SW2-2) switch is ignored. In all other rate settings, the unit emplo ys G.
10 SW1-8: Enable/Disable Loop T ests from DTE Use Switch SW1-8 to allow Model 2701 to enter loopbac k tests when the DTE raises the appropriate loop request pin. Switch SW2-1 Line Coding: HDB3 (default) Use Switch SW2-1 to control the Network Line Coding options.
11 Every other pulse is inv erted from the previous pulse in polarity , so that the signal can be eff ectively tr ansmitted. This means, howe ver , that a long sequence of zeros in the data stream will cause problems , since the NTU receiving the signal relies on the signal to recov er the 2.
12 Switch SW2-4: Remote Digital Loopback T ype The user can set this s witch to select the type of remote loop that will be initiated by the Model 2701. If set to V .54, the Model 2701 will initiate a V .54 loop when Remote Loop is selected by the front panel s witches.
13 4.0 INSTALLATION Once the Model 2701 is properly configured, it is ready to connect to the G.703/G.704 interf ace, to the serial por t, and to the power source . This section describes how to make these connections . 4.1 CONNECTING TO THE G.703 NETWORK The P ower , G.
14 (Figure 4) f ollowing the pinout and signals chart below to connect the 120 ohm G.703/G.704 network channel. Figure 4. G.703/G.704 170 ohm Connection. 4.2 CONNECTING THE SERIAL PORT The Model 2701/B, C , D suppor ts RS-530, V .35, X.21 serial por t connec- tions.
15 Connecting to a “DCE” Device If the Model 2701 serial interface is hard-wired as a DCE (all e xcept the X.21 version), y ou must use a null modem cable when connecting to a modem, multiple xer or other DCE de vice. This cable should be of the shor test possible length—we recommend 6 f eet or less.
16 DC P ower The 36–60 VDC DC to DC adapter supplied with the DC version of the Model 2701 plugs in a DC source (nominal 48 VDC) and plugs into the barrel power supply jac k on the rear of the 2701. Refer to Figure 5 to make the proper connection. Figure 5.
17 5.0 OPERATION When the Model 2701 has been properly configured and installed, it should operate transparently . This sections descr ibes power-up , LED status monitors, and the b uilt-in loopback test modes .
18 the identical pattern. When it receives the correct pattern, the LED will turn off. If error inser tion is on, the LED will blink once a second if e verything is operating properly . TM (Active Y ellow) Solid Y ellow indicates an Activ e T est Mode.
19 2. V er ify that the data terminal equipment is operating proper ly and can be used f or a test. 3. P erform a V .52 BER (bit error rate) test as described in section “Using the V .
20 — Set the front panel s witch to “Remote”. 2. P erf orm a bit error rate test (BERT) using the internal V .52 genera- tor (as described in section “Using the V .
21 APPENDIX A SPECIFICATIONS A.1 NETWORK DATA RATE 2.048 Mbps A.2 NETWORK CONNECTOR RJ-48C/Dual Coax BNC (2701/D) A.3 NOMINAL IMPEDANCE 75/120 ohm A.4 LINE CODING Selectable AMI or HDB3 A.5 LINE FRAMING G.703 (Unframed) or G.704/G.732 (F ramed) A.6 CRC-4 MULTIFRAMING Selectable On or Off A.
22 A.12 POWER SUPPLY +5 VDC Exter nal power supply/100–240 V AC , 50–60Hz, 0.4A A.13 HUMIDITY Up to 90% non-condensing A.14 T EMPERATURE 0 to 50°C (32 to 122°F) A.
23 APPENDIX B INTERF ACE PIN ASSIGNMENT EIA-530 Interface Pin Description (DB-25 Female Connector) (DCE Configuration) Pin # Signal 1 FG (Fr ame Ground) 2 TD (T ransmit Data) 3 RD (Receive Data) 4 RT.
24.
25 APPENDIX C INTERF ACE PIN ASSIGNMENT V .35 Interface (M/34F Female Connector) (DCE Configuration) Pin # Signal B SGND (Signal Ground) C R TS (Request to Send) D CTS (Clear to Send) E DSR (Data Set.
26.
27 APPENDIX D INTERF ACE PIN ASSIGNMENT X.21 Interface (DB-15 Female Connector) (DTE /DCE Configuration) Pin # Signal 1 Fr ame Ground 2 T (T ransmit Data-A) 3 C (Control-A) 4 R (Receive Data-A) 5 I (.
28 APPENDIX E F ACTOR Y REPLACEMENT P AR TS AND ACCESSORIES Cop yright © 2004 P atton Electronics Company All Rights Reser ved. P atton Model # Description 2701/B G.703/G.704 NTU with RS-530 interf ace 2701/C G.703/G.704 NTU with a V .35 interf ace 2701/D G.
An important point after buying a device Patton electronic 2701/B (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Patton electronic 2701/B yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Patton electronic 2701/B - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Patton electronic 2701/B you will learn all the available features of the product, as well as information on its operation. The information that you get Patton electronic 2701/B will certainly help you make a decision on the purchase.
If you already are a holder of Patton electronic 2701/B, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Patton electronic 2701/B.
However, one of the most important roles played by the user manual is to help in solving problems with Patton electronic 2701/B. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Patton electronic 2701/B along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
