Patton electronic 2500 Series manual

USER MANUAL MODEL 2500 Series Models 2500, 2510, 2520 All-Rate CSU/DSU SALES OFFICE (301) 975-1000 TECHNICAL SUPPORT (301) 975-1007 P ar t# 07M2500-C Doc# 099021UC Revised 3/13/96[...]

T ABLE OF CONTENTS Section P age 1.0 General Inf ormation ...............................................................2 1.1 W arr anty Statement 1.2 Radio and TV Interf erence 1.3 FCC Inf or mation 1.4 Ser vice Inf or mation 2.0 Product Ov er vie w ..................................................................4 2.1 Product F eatures 2.2 Gene[...]

2.0 PRODUCT OVERVIEW This section provides an o v er view of the Model 2500 Series, including f eatures , general description, and a breakdown of model numbers b y application. 2.1 PR ODUCT FEA TURES • Operates ov er 4-wire dedicated digital lines • Suppor ts rates of 56 kbps and 64 kbps and all sub rates • Suppor ts Switched 56 dialing • P[...]

3.0 INST ALLA TION This section descr ibes connection of the Model 2500 Ser ies to the DTE and telco (line) interf aces , as well as AC pow er connection 3.1 DTE INTERF A CE CONNECTION The Model 2500 Ser ies has connectors f or both V .35 and RS-232 interf aces . Signals output b y the Model 2500 Series will appear on both interf aces . An inter na[...]

4.0 CONFIGURA TION Bef ore y ou can operate your Model 2500 Series CSU/DSU , you must configure the unit. Configur ation ma y be done using the e xter nally accessib le hardware s witches or b y using the software s witches . Software switches can be accessed from the front panel control por t using a VT -100 type RS-232 ter minal that responds to [...]

4.1.1 SWITCH SET SW1 The configuration s witches on s witch set SW1 allo w you to specify Line Rate , Circuit Assurance , R TS, Char acter Length, Data Format and DSR Loop Status. Figure 3 (belo w) summar iz es SW1 s witch settings , including the f actor y def aults. F ollowing Figure 4 is a description of each s witch setting. Line Rate These s w[...]

Character Length In asynchronous data f or mat, 10 and 11 bit characters are suppor ted. This setting is ignored in synchronous data format. Character Char acter Descr iption SW1-6 Length Start Data bits P ar ity Stop bits Off 10-bit 1 8 None 1 or more 1 7 1 1 or more 1 7 None 2 On 11-bit 1 8 1 1 or more 1 9 None 1 or more Data Format The data f or[...]

DTE Loop Contr ol The local loop and remote loop can be activ ated from the DTE interf ace using signals “LL ” and “RL ”. SW2-4 On Enab le LL and RL inputs Off Disab le Cloc k Mode The appropriate transmitter cloc king modes can be selected f or Dedicated DDS , Switched-56 or campus-area (pr iv ate) operation. SW2-5 SW2-6 Mode Descr iption [...]

4.2.1 USING THE SOFTW ARE MENU SYSTEM The Model 2500 Ser ies Men u System operates as f ollo ws: 1) All selections must be follo wed by [RETURN]. 2) T o mak e a selection from an y menu, enter the option number at the prompt and press [RETURN]. 3) T o e xit an y menu without making a selection, press [ESC] f ollo wed by [RETURN]. (Note: Y ou can al[...]

Character Length Choosing option 4 in the Softw are Switch Men u takes you to the Character Length Men u (below). In asynchronous data f or mat, the Model 2500 Ser ies suppor ts 10-bit and 11-bit character lengths . Set this option according to the characteristics of the data being transmitted. DTE Data Format Choosing option 5 in the Softw are Swi[...]

Note 2 : Y ou can use the Model 2500 Ser ies to transmit low er-speed asynchronous data (up to 9.6 kbps) ov er synchronous circuits b y simple o ver-sampling. T o do this, select the synchronous data f or mat and set the line Line Rate (Softw are Switch Men u option 1) to at least f our times that asynchronous data rate y ou wish to send. F or e xa[...]

21 22 Cloc k Mode Choosing option 9 in the Software Switch Men u takes y ou to the Cloc k Mode Menu (belo w). Set this option as f ollo ws: • Internal (Master): T o use the Model 2500 Ser ies inter nal reference cloc k as the timing source, select item 1. Use inter nal timing in point-to- point applications where the Model 2500 Ser ies is being u[...]

5.0 OPERA TION Once the Model 2500 Ser ies unit is installed and configured proper ly it is ready to oper ate. This section describes the function of the LED indicators, the status displa ys, the use of loopbac k test modes, and Switched 56 dialing procedures (Models 2510 and 2520 only). 5.1 LED DESCRIPTIONS The Model 2500 Ser ies is equipped with [...]

25 26 In the Read Configuration Men u, you ma y select item 1 to read the hardw are s witch configuration or item 2 to read the software s witch configuration. A sample screens is sho wn below: 5.2.2 DISPLA YING LINE/LOOP ST A TUS T o chec k the current status of the Model 2500 Ser ies and the associated circuit, go to the Main Menu (see Section 4.[...]

27 28 LAL T est Pr ocedure Once LAL is activ ated, the Model 2500 Ser ies tr ansmit output is connected to its own receiv er . The “T est” LED should be lit. F ollo w these steps to complete the test: 1) V erify that the data ter minal equipment is operating properly and can be used f or a test. If a f ault is indicated, call a technician or re[...]

29 30 CSU Loop The CSU Loop is activ ated when the central office re v erses the DC sealing current that flows betw een the TX pair and the RX pair . In this case , the Model 2500 Ser ies recognizes this and loops signals on the RX pair bac k to the central office on the TX pair (see Figure 8, below). While the CSU Loop is activ ated by the centr a[...]

31 32 5.5 SWITCHED 56 DIALING COMMANDS (MODELS 2510 & 2520) T o access the Switched 56 dialing capabilities of the Mode 2500 Ser ies , go to the Main Menu (see Section 4.2 ) and select item 5, “Set Switched 56 Dialing P ar ameters”. This will take y ou to the Switched 56 Menu (see belo w). The f ollowing par agraphs describe the commands in[...]

33 34 APPENDIX A SPECIFICA TIONS DDS T ype: Dedicated T ransmission Format: Asynchronous, synchronous Interface: RS-232 and V .35 Standar ds: A T&T 62310 compliant DDS Line Rates: 2.4, 4.8, 9.6, 19.2, 56 and 64 kbps DTE Rates: 2.4, 4.8, 9.6, 19.2, 38.4, 56, and 64 kbps; 57.6 kbps, async , 2 stop bits Contr ol P or t: Configuration and diagnosti[...]

35 36 APPENDIX C F A CT OR Y REPLACEMENT P ARTS AND A CCESSORIES P atton Model # Description 10-2500 ...........................DDS Cab le, RJ48 - RJ48, 6 f oot 10-561S ...........................Control P or t Cable, EIA-561, 6ft, shielded 12M-561 ..........................Adapter , EIA-561 to DB-25 Male 12F-561 ...........................Adapter [...]

(APPENDIX D - Continued) DB-25 CONNECT OR, TERMINAL INTERF A CE Pin # Signal 1 F rame Ground 2 TD 3 RD 4 R TS 5 CTS 6 DSR 7 SGND (Signal Ground) 8 CD 15 TC 17 RC 18 LL (Local Loop) 20 DTR 21 RL (Remote Loop) 24 XTC 25 TM (T est Mode) CONTR OL PORT INTERF A CE 8 P osition modular connector compliant with EIA-561. Pin # Signal 4 Signal Ground 5 RD (O[...]