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MULTIPORT CSU/DSU

Table A-3. X.21 Interface (DB15 female connector) (DTE/DCE

Configuration).

Pin #

Signal

1 - - - - - - - - - - - - - - - - - - Frame Ground

2 - - - - - - - - - - - - - - - - - - T (Transmti Data-A)

3 - - - - - - - - - - - - - - - - - - C (Control-A)

4 - - - - - - - - - - - - - - - - - - R (Receive Data-A)

5 - - - - - - - - - - - - - - - - - - I (Indication-A)

6 - - - - - - - - - - - - - - - - - - S (Signal Element Timing-A)

8 - - - - - - - - - - - - - - - - - - SGND (Signal Ground)

9 - - - - - - - - - - - - - - - - - - T (Transmit Data-B)

10 - - - - - - - - - - - - - - - - - C (Control-B)

11 - - - - - - - - - - - - - - - - - R (Receive Data-B)

12 - - - - - - - - - - - - - - - - - I (Indication-B)

13 - - - - - - - - - - - - - - - - - S (Signal Element Timing-B)

Summary of Contents for MT210A

Page 1: ...D S R D T R N o S ig n a l E rr o r T e s t M o d e Line Rate DTE Status Line Status Test Modes Normal Remote Errored Normal Off Loop Pattern CUSTOMER SUPPORT INFORMATION Order toll free in the U S Call 877 877 BBOX outside U S call 724 746 5500 FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence P...

Page 2: ...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 by 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 from ...

Page 3: ...uipment causes harm to the telephone network the telephone company may temporarily disconnect your service The telephone company will try to warn you in advance of any such disconnection but if advance notice is not practical it may disconnect the service first and notify you as soon as possible afterwards If such a disconnnection is necessary you will be advised of your right to file a complaint ...

Page 4: ...uations Repairs to certified equipment should be made by an authorized Canadian maintenance facility in this case your supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment Users should ensure for their own protection that the electrical ground connections of the...

Page 5: ...arato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las instrucciones de operación Todo otro servicio deberá ser referido a personal de servicio calificado 9 El aparato eléctrico debe ser situado de tal manera que su posición no interfiera su uso La coloc...

Page 6: ...tir una antena externa deberá ser localizada lejos de las lineas de energia 16 El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilación 18 Servicio por personal calificado deberá ser provisto cuando A El cable de poder ...

Page 7: ...6 MULTIPORT CSU DSU TRADEMARKS The trademarks mentioned in this manual are the sole property of their owners ...

Page 8: ...e Serial Port 29 4 1 1 Changing the Modules 29 4 1 2 Connecting a DTE Device 30 4 1 3 Connecting a DCE Device 30 4 1 4 Configuring the X 21 Module 31 4 2 Connecting the Twisted Pair Interface 31 4 3 Connecting Power 32 5 Operation 33 5 1 Power On 33 5 2 LED Status Monitors 33 5 3 Loop V 54 and Telco Diagnostics 34 5 3 1 Operating Local Analog Loopback LAL 34 5 3 2 Operating Remote Digital Loopback...

Page 9: ...t local and remote loopbacks V 52 compliant 511 and 2047 BER tests Indicators Front panel LEDs DDS line rates 2 4 4 8 9 6 19 2 38 4 and 57 6 kbps Power TD RD RTS CTS DCD DSR DTR No Signal Test Mode Error Indication Distance 49 dBm receiver sensitivity or better RTS CTS Delay 0 ms 50 ms Front Panel Switches Loopback indication and Bit Error Rate Test Temperature Range 32 to 122 F 0 to 50 C Altitude...

Page 10: ...9 MULTIPORT CSU DSU Power Universal Input UI 100 to 253 VAC Input DC 18 VDC to 72 VDC 48 V nominal Size 1 6 H x 7 3 W x 6 6 D 4 1 x 18 5 x 16 8 cm Weight 2 lb 0 9 kg ...

Page 11: ...ators monitor data and control signals The CSU DSU also offers convenient V 52 BER and V 54 compliant loop diagnostics Replaceable modules come with a variety of interfaces Select from the following RS 232 DB25 female part number ME481C 232 RS 422 530 DB25 female part number ME481C 422 V 35 M 34 female part number ME481C 35 X 21 DB15 part number ME481C X21 G 703 RJ 45 part number ME481C G703 Ether...

Page 12: ... 35 RS 422 530 G 703 X 21 and Ethernet Bridge V 52 BER and V 54 compliant loop diagnostics 511 and 2047 Bit Error Rate Tests 24 easy to read LED indicators to monitor data signals Internal external received loopback and campus clock modes AT T 62310 compliant Can be used as a high speed modem for private twisted pair lines Made in the USA ...

Page 13: ...re grouped into three eight switch sets You can access them externally from the underside of the CSU DSU see Figure 3 1 Figure 3 1 Underside of the CSU DSU Showing the Location of the DIP Switches The three sets of DIP switches on the underside of the CSU DSU will be referred to as S1 S2 and S3 Figure 3 2 shows the orientation of all DIP switches with respect to ON and OFF positions Figure 3 2 Clo...

Page 14: ...Rate S1 3 DTE Rate Off S1 4 RTS CTS Delay Off Normal S1 5 Anti Stream Timer Off Off S1 6 Data Format Off Synchronous S1 7 Character Length Off 10 Bits S1 8 Extended Signal Rate Off Off Switches S1 1 S1 2 and S1 3 Data Rate Use switches S1 1 S1 2 and S1 3 to configure the DTE rate of the CSU DSU This rate represents the synchronous or asynchronous rate at which the DTE must connect to the CSU DSU s...

Page 15: ...rop that is continuously transmitting If the DTE keeps RTS raised for more than the time value in seconds the timer forces RTS off internally This allows the rest of the multidrop network to resume operation The CSU DSU remains in the forced off condition until the terminal drops RTS Use Switch S1 5 to enable the timer Table 3 4 Settings for Switch S1 5 Timer Value in Sec at Various Line Rates S1 ...

Page 16: ...it 8 data bits 1 stop bit 0 parity bits 10 bits Switch S1 8 Extended Signaling Rate Use S1 8 to configure the frequency tolerance the CSU DSU looks for in asynchronous data rates the actual variance from a given frequency level the CSU DSU will tolerate Table 3 7 Settings for Switch S1 8 S1 8 Setting Off 2 5 to 1 On 2 5 to 2 3 3 1 2 DIP SWITCH SET S2 You can use the DIP switches on set S2 to confi...

Page 17: ...rance Off Disabled Switches S2 1 S2 2 and S2 3 Line Rate Use Switches S2 1 S2 2 and S2 3 to configure the signaling rate on the line RJ 48 female port The setting should match the speed of your digital service Table 3 9 Settings for Switches S2 1 S2 2 and S2 3 S2 1 S2 2 S2 3 Line Rate On On On 2 4 kbps On On Off 4 8 kbps On Off On 9 6 kbps On Off Off 19 2 kbps Off On On 57 6 kbps Off On Off 64 kbp...

Page 18: ... line signal Allows remote device in campus clock mode to initiate V 54 loopback For use only in campus short haul configuration NOTE Local device must be set in internal clock mode NOTE For X 21 or async campus short haul modem applications configure one Multiport CSU DSU for internal clock mode and the other CSU DSU for receive recover clock mode Switch S2 6 Force RTS Use S2 6 to force the trans...

Page 19: ...dedicated circuits you can configure the transmitter and the CTS output to go on only when a working communication circuit is established If Circuit Assurance is used enable it on only one end of the communication link Use Switch S2 8 to configure circuit assurance Table 3 13 Settings for Switch S2 8 S2 8 Circuit Assurance Description On Enabled CTS will go low and the transmitter will be held off...

Page 20: ...Position Function Factory Default S3 1 Test Pattern Off 511 S3 2 RDL Response Off Enabled S3 3 Front Panel Switches Off Enabled S3 4 DTE Loop Request On Disabled S3 5 Reserved for future use S3 6 Reserved for future use S3 7 Control Port Speed Off S3 8 Control Port Speed Off Switch S3 1 Test Pattern Use Switch S3 1 to set the V 52 compliant pattern used to test the CSU DSU The two test options are...

Page 21: ... Disable Use Switch S3 3 to enable or disable the front panel switches Table 3 16 Settings for Switch S3 3 S3 3 Activation Description Off Enabled Front panel switches may be used to activate terminate diagnostics On Disabled Front panel switches will have no effect on the operation of the unit Switch S3 4 DTE Loop Request Line Enable Disable Use Switch S3 4 to activate or deactivate DTE control o...

Page 22: ...the Multiport CSU DSU via a menu driven command system Follow the instructions below 1 Connect the serial RS 232 port of a VT100 or similar DTE with terminal emulation to the EIA TIA 5611 port of the CSU DSU To construct an RS 232 to EIA 561 patch cable refer to the control port pinout diagram in Appendix A For a pre made cable refer to Appendix B and call Black Box Technical Support at 724 746 55...

Page 23: ...O MAIN MENU The Main Menu shows the CSU DSU configuration options This section describes each of the listed selections Figure 3 20 Main Menu Helpful Hints 1 To make a selection type the highlighted letter that corresponds to a menu selection TOP LEVEL MANAGEMENT UNDER SOFTWARE CONTROL Software Control Hardware Control Display Hardware Configuration Software Configuration Diagnostics Statistics Cha...

Page 24: ...rner of the Main Menu screen 3 2 2 CONFIGURING THE MULTIPORT CSU DSU Software Control Select Software Control from the Main Menu to place the CSU DSU under software switch control When the CSU DSU is under software switch control the hardware switch configuration DIP Switches S1 S2 and S3 will not affect its operation Hardware Control Select Hardware Control from the Main Menu to place the CSU DSU...

Page 25: ...re Configuration Screen Hardware Configuration Display Only Line Rate 56 kbps Rate adapter 19 2 kbps Transmit Clock Source Network Data Format Asynchronous Character Length 10 Bits Extended Signal Rate Normal RTS CTS Delay Extended Forced RTS Off Anti Stream Timer On DSR Loop Status On Circuit Assurance On Front Panel Switches Enabled Response to Remote Loop Enabled DTE Loop Request Disabled Test ...

Page 26: ...e highlighted letter that corresponds to a menu selection 2 Press Space Bar until the desired value is highlighted 3 Press Enter CR to select the desired value Software Configuration Line Rate 56 0 kbps Rate Adapter DTE Rate 19 2 kbps Transmit Clock Source Network Data Format Asynchronous Character Length 11 bits Extended Signaling Rate Extended RTS CTS Delay Extended Forced RTS Off Anti Stream Ti...

Page 27: ...ive Remote Remote Digital Loopback is active Under Remote Loop The remote CSU DSU has initiated a Remote Digital Loopback test Under CO Loop The CO has initiated a CSU Loop or a DSU Loop Test patterns are shown below 511 The 511 BER test is active 511 E The 511 E BER test is active 2047 The 2047 BER test is active 2047 E The 2047 E BER test is active Diagnostics and Statistics Select Active Loop L...

Page 28: ...n menu see Figure 3 24 below Save Changes Select Save Changes to save any modifications in the previous sections Changes not saved will be lost when you power off the CSU DSU Logoff Select Logoff to exit the software configuration After you select Logoff the CSU DSU will re display the login screen Figure 3 24 Software Configuration Menu TOP LEVEL MANAGEMENT UNDER SOFTWARE CONTROL Software Control...

Page 29: ...ne to six alphanumeric ASCII characters 0 9 a z or A Z at the New Password _ prompt 2 Press Enter CR 3 To review the new password select Software Configuration from the Main Menu The new password will be shown as the last item in the software configuration listing f ...

Page 30: ... 4 1 shows how an interface module plugs into the back of the CSU DSU Figure 4 1 Installing a Plug In Serial Interface Module into the CSU DSU 4 1 1 CHANGING THE MODULES To install or remove an interface module ordered separately see page 10 for a complete list of available modules follow these steps To install an interface module 1 Make sure the power switch is off Leave the power cord plugged in...

Page 31: ...o keep the unit grounded 2 Loosen the two thumbscrews on the module by turning them counter clockwise 3 Grasp the two thumbscrews and gently pull the module from the CSU DSU Apply equal force to the thumbscrews to keep the module straight while you remove it 4 1 2 CONNECTING TO A DTE DEVICE The serial port on most interface modules all except the X 21 module is hard wired as a DCE Therefore these ...

Page 32: ...CE Reverse the DCE DTE orientation by pulling the strap out of its socket rotating it 180 then plugging the strap back into the socket You will see that the DCE DTE arrows now point in the opposite directions showing the new configuration of the X 21 port Re install the module according to the instructions in Section 4 1 1 4 2 Connecting the Twisted Pair Interface The network interface is an 8 pos...

Page 33: ...w these steps 1 Attach the supplied power cord to the shrouded male IEC 320 connector on the rear of the CSU DSU 2 Plug the power cord into a nearby AC power outlet 3 Turn the rear power switch ON WARNING There are no user serviceable parts in the power supply section of the CSU DSU Only qualified service personnel should replace the fuse Call Black Box Technical Support at 724 746 5500 for more i...

Page 34: ...5 1 shows the front panel location of each LED Following Figure 5 1 is a description of each LED s function Figure 5 1 Front Panel of the Multiport CSU DSU Power Glows red when power is present Line Rate The corresponding LED will glow red to indicate the selected line rate TD and RD Glow red to indicate an idle condition of binary 1 data on the respective terminal interface signals Green indicate...

Page 35: ...ate that the local CSU DSU has not yet connected with the central office or to the remote CSU DSU when used in a campus short haul application 5 3 Loop V 54 and Telco Diagnostics The CSU DSU offers three V 54 loop diagnostics and is compatible with two telco loop diagnostics Use these diagnostics to test the CSU DSU and any communication links These tests can be activated physically from the front...

Page 36: ...e cable between the terminal and the CSU DSU 5 3 2 OPERATING REMOTE DIGITAL LOOPBACK RDL The Remote Digital Loopback RDL test checks the performance of both the local and remote CSU DSUs as well as the communications link between them Any characters sent to the remote CSU DSU in this test mode will be returned back to the originating device characters typed on the keyboard of the local terminal wi...

Page 37: ...ing current that flows between the Transmit TX and Receive RX pairs The CSU DSU recognizes this and loops the signals on the RX pairs back to the central office on the TX pair While the CSU loop is activated the TM indicator lights Figure 5 4 CSU Loop 5 4 Bit Error Rate V 52 Diagnostics The CSU DSU offers two V 52 Bit Error Rate BER test patterns You can invoke them along with the LAL and RDL test...

Page 38: ...pproximately once per second causing the Error LED to blink To perform a V 52 BER test follow these steps 1 Select the 511 or 2047 test pattern using DIP Switch 3 1 2 Locate the Pattern toggle switch on the front panel of the CSU DSU and move it down to Normal This activates the V 52 transmission and reception of the selected test pattern If there are errors in the received pattern the error LED w...

Page 39: ... DSR Data Set Ready 7 SGND Signal Ground 8 CD Carrier Detect 9 RC Receive Timing B 10 CD Carrier Detect B 11 XTC External Transmit Clock 12 TC Transmit Clock B 13 CTS Clear to Send 14 TD Transmit Data B 15 TC Transmit Clock 16 RD Receive Data 17 RC Receive Clock 18 LLB Local Line Loop 19 RTS Request to Send 20 DTR Data Terminal Ready 21 RDL Remote Digital Loop 22 DSR Data Set Ready 23 DTR Data Ter...

Page 40: ...nd E DSR Data Set Ready F CD Carrier Detect H DTR Data Terminal Ready L LLB Local Line Loop M TM Test Mode N RDL Remote Digital Loop P TD Transmit Data A R RD Receive Data A S TD Transmit Data B T RD Receive Data B U XTC External Transmit Clock V RC Receive Clock W XTC External Transmit Clock X RC Receive Clock B Y TC Transmit Clock A AA TC Transmit Clock B ...

Page 41: ... DTE DCE Configuration Pin Signal 1 Frame Ground 2 T Transmti Data A 3 C Control A 4 R Receive Data A 5 I Indication A 6 S Signal Element Timing A 8 SGND Signal Ground 9 T Transmit Data B 10 C Control B 11 R Receive Data B 12 I Indication B 13 S Signal Element Timing B ...

Page 42: ...CSU DSU Control Port Pinout The CSU DSU control port is an 8 position connector that complies with EIA TIA 561 Table B 1 CSU DSU Control Port Pinout Pin Function RJ 45 Pin Number Ground 4 Receive Data to DTE 5 Transmit Data from DTE 6 ...

Page 43: ...n 19 2 kbps Off On Off 38 4 kbps On On Off DTE Rate Off On On Line Rate RTS CTS Delay Normal Off Extended On Anti Stream Timer Disabled On Enabled Off Data Format Synchronous Off Asynchronous On Asynchronous Character Length 10 bits Off 11 bits On Extended Signaling Rate 2 5 to 1 Off 2 5 to 2 3 On Factory default settings for DIP Switch S1 For more information about DIP Switch S1 settings see Sect...

Page 44: ...rnal DTE On Off Network Looped Off Off Internal Master On On Campus Clock Off On Force RTS Forced On On Follows DTE Signal Off Data Set Ready During Local Loopback Test DSR on during local line loop On DSR off during local line loop Off Circuit Assurance Enabled On Disabled Off NOTE Forces configuration pointer to default to hardware control Factory default settings for DIP Switch S2 For more info...

Page 45: ...d On Front Panel Switch Enabled Off Disabled On DTE Loop Request Line Enabled Off Disabled On Not used Off Off Control Port Data Rate 9 6 kbps On Off 19 2 kbps Off Off NOTE DIP Switches S3 5 and S3 6 are reserved for future use and must remain in the Off position Factory default settings for DIP Switch S3 For more information about DIP Switch S3 settings see Section 3 1 3 ...

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