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CHAPTER 4 : GENERAL INFORMATION AND FEATURES 

3)  If you are unsure whether the electrical service in your building is properly grounded, have 

it examined by your municipal electrical inspector. 

4) Install a surge protector between the NTU and AC power outlet. Any additional computer 

equipment you have connected to the NTU (directly or through another device), such as a 
terminal or printer, should also be plugged into the same surge protector. Make sure that 
the surge protector is properly rated for the devices you have connected to it. 

2.4 Site 

Selection 

 
Locate the DT-128 NTU no farther than 50 feet (15.24 meters) from your data terminal 
equipment (DTE) and within 6 feet (1.83 meters) of a grounded AC outlet furnishing the 
required power. 

Install the modem in a clean area that is free from environmental extremes. Allow at least 6 
inch (15.24 cm) in front of the modem for access to the front panel, and at least 4 inch (10.2 
cm) in back for cable clearance. Position the modem so you can easily see the front panel. Do 
not stack the DT-128 on top of another NTU. 

• 

CAUTION: To avoid overheating the DT-128, do not place anything within 1 inch (2.54 
cm) of either side of the NTU, and do not place the NTU on its side. 

 

2.5 

AC Electrical Outlet Connection 

 
Check the label on the bottom of the modem for the unit's power requirements. Once you are 
certain the power requirements specified on the label match those of your electrical outlet, 
plug the DT-128 NTU into the outlet. 

Once the DT-128 NTU is installed as described in the previous sections, you may turn the 
power on. The NTU performs a self-test before DT-128 NTU greeting message appears on the 
liquid crystal display (LCD) on the NTU front panel. 

2.6 

Connecting with 2-wire/4-wire Line 

 
To connect your NTU to a permissive RJ11 voice jack in 2/4 wire-line, follow this procedure: 

1)  Connect the 4-pin modular to 4-pin modular cable provided to connect your NTU to the 

line set via an RJ11 jack. 

2)  For the older version (H/W: V3.x, S/W: V2.x), change 2W/4W dip switch from (1,2) pins 

ON and (3,4) pins OFF to (3,4) pins ON and (1,2) pins OFF in the rear panel. 

3)  The newest version (H/W:V4.3, S/W:V3.0) of DT-128 was improved allowing 2W/4W 

selection through LCD menu-driven under CONFIG NTU MENU. 

-7- 

Summary of Contents for DT-128 Series

Page 1: ...ION SYSTEM CORP Headquarters No 25 Alley 15 Lane 120 Sec 1 Nei Hu Rd Taipei 114 Taiwan TEL 886 2 26583000 FAX 886 2 26583232 http www tainet net Beijing Branch 3F A Building 113 Zhi Chun Lu HaiDian Di...

Page 2: ......

Page 3: ...ree 15 3 4 1 Test Menu 15 3 4 2 Config NTU Menu 16 3 4 3 Config DTE Menu 17 3 4 4 Profile Menu 18 3 5 Operating The DT 128N 19 CHAPTER 4 GENERAL INFORMATION AND FEATURES 21 4 1 Preview 21 4 2 2W 4W Un...

Page 4: ...aged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equip...

Page 5: ...CHAPTER 1 THE TAINET DT 128 SERIES NTU CONTENT 1 1 Description 1 2 Technical Specifications 1 3 Ordering Information 1...

Page 6: ...flexible use in different applications option in LT mode DT 128 and DT 128N also provide diagnostic capability including Analog loopback Digital loopback Local and Remote and BER TEST for troubleshoo...

Page 7: ...one Type Less than 6 5 Watts Rack Mount Type Less than 110 Watts Full Shelf Equipped Operating Temperature 0 C 50 C Storage Temperature 25 C 70 C Relative Humidity up to 95 non condensing Physical Siz...

Page 8: ...130W power unit for rack PW 132D 36 72 VDC 130W power unit for rack TAINET MANAGER Network Management System for DT 128N for Windows Interface option V 35 V 24 RS 232 RS 530 X 21 V 11 G 703 64Kbps co...

Page 9: ...ENERAL INFORMATION AND FEATURES CHAPTER 2 INSTALLATION CONTENT 2 1 Description 2 2 Unpacking 2 3 Site Requirements 2 4 Site Selection 2 5 AC Electrical Outlet Connection 2 6 Connecting With 2 Wire 4 W...

Page 10: ...ents set forth by the FCC The following procedure outlines some common practices which can minimize the risk of damage to computer equipment from electrical surges 1 Make sure the electrical service i...

Page 11: ...o not stack the DT 128 on top of another NTU CAUTION To avoid overheating the DT 128 do not place anything within 1 inch 2 54 cm of either side of the NTU and do not place the NTU on its side 2 5 AC E...

Page 12: ...ND FEATURES The pin layout of the connector for RJ11 operation is as follows RJ11 ON OFF DTE Pin No Color 2 Wire 4 Wire 1 N A 2 Black RX 3 Red TX RX TX 4 Green TX RX TX 5 Yellow RX 6 N A Line Fig 2 1...

Page 13: ...INFORMATION AND FEATURES CHAPTER 3 FRONT PANEL LCD AND MENU DRIVEN CONTENT 3 1 The Front And Rear Panels 3 2 Operating The DT 128 3 3 The Menu Tree 3 4 Detailed Description of The Menu Tree 3 5 Operat...

Page 14: ...nt panel The rear panel of TAINET DT 128 NTU contains an IEC 320 AC Power Inlet Connector a Power On Off switch a RS 232 connector connected to DTE Equipment and one RJ11 telephone jack connected to 2...

Page 15: ...function for U interface linking up or HOME key for set up menu to go back to the home menu Left key It is used to shift to left field Right key It is used to shift to right field ENTER Enter key It i...

Page 16: ...e LT SYNC 128K CONNECT Description 1 Mode LT Mode NT Mode 2 Status Handshake Activate Connect 3 Data Format SYNC ASYNC 4 Speed DTE speed DCE speed 128Kbps B Menu Select Example 1 Example 2 L MENU SELE...

Page 17: ...Status retries 4 Use or keys to shift among field press ENTER key to enter the selected menu D Set up Menu Example 1 Example 2 LT NT mode LT Internal Data Rate Form SYNC Description 1 Use or keys to s...

Page 18: ...NT Loopback Line Type 2W 4W 4W Atten 16dB D CONFIG DTE MENU Data Rate Format Sync 128K Sync 64K Sync 38 4K Sync 19 2K Sync 9 6K Sync 4 8K Sync 2 4K Async 38 4K Async 19 2K Async 9 6K Async 4 8K Async...

Page 19: ...This test can control remote NTU to perform digital loop for finding out if the NTU and line of both ends are in normal condition RDL Grant ON OFF Set for accepting remote digital loop RDL test Enabl...

Page 20: ...Hz tone internal clock source LT external Select LT mode for activating request by sending 10k Hz tone external clock source NT loopback Select NT mode for waiting 10kHz tone loopback clock source Li...

Page 21: ...kbps Async from 300bps to 38 4kbps Asynchronous data format is 1 start bit 8 data bits and 1 stop bit Actually this kind of format could apply with 1 start bit 7 data bits 1 parity bit and 1 stop bit...

Page 22: ...4K NT mode SYNC 64K 4 LT ASYNC 38 4K LT mode ASYNC 38 4K 5 NT ASYNC 38 4K NT mode ASYNC 38 4K Item Config NTU mode Config DTE mode Load LT NT Mode Data Rate Format DSR CTS DCD factory profile 0 LT int...

Page 23: ...re 4 is a card type of DT 128 The card associated with TRS 32 has the same layout as the DT 128 The operation of DT 128N is similar to DT 128 and user can refer to TRS 32 manual to get more informatio...

Page 24: ...N AND FEATURES CHAPTER 4 GENERAL INFORMATION AND FEATURES CONTENT 4 1 Preview 4 2 2W 4W Uncondition Twisted Line 4 3 LT Mode VS NT Mode 4 4 Synchronous VS Asynchronous 4 5 Configuration Profile Set up...

Page 25: ...offers two independently unilateral transmission channel therefore it can achieve full duplex communication with less interference Obviously the line quality of 4W line is better than that of 2W line...

Page 26: ...Profile Set Up The DT 128 has various operating modes To save your energy it provides 6 sets of factory default settings Users may choose the most similar factory default setting by pressing key prop...

Page 27: ...ords there is no difference for you to operate the front panel of the local NTU from the remote one except that all keys on the remote NTU are disabled Especially we should mention that in our device...

Page 28: ...CHAPTER 4 GENERAL INFORMATION AND FEATURES CHAPTER 5 MAINTENANCE CONTENT 5 1 Description 5 2 Instruments 5 3 Periodic Maintenance 5 4 Troubleshooting 5 5 Return Procedure 24...

Page 29: ...ff Consequently make sure the IC s on printed circuit board are firmly sited Try to turn the power on again if the trouble still exists please follow the procedures below 1 Power Unit Make sure you ge...

Page 30: ...8000 bps 1 64000 bps 2 38400 bps 3 19200 bps 4 9600 bps 5 4800 bps 6 2400 bps 7 1200 bps 8 600 bps 9 300 bps Test 0 bit bit 0 0 AL off 1 AL on bit 1 0 DL off 1 DL on bit 2 0 RDL off 1 RDL on bit 3 0 L...

Page 31: ...00 Internal clock 01 External clock 10 Loopback clock bit 7 6 5 4 Reserved Lead 0 bit bit 0 0 DSR normal 1 DSR forced on bit 1 0 DTR normal 1 DTR forced on bit 2 0 RTS normal 1 RTS Force on bit 3 0 CT...

Page 32: ...ement Timing B 10 109b CF B 109b V 11 DCE DTE Received Line Signal Detector B 11 113b DA B W V 11 DCE DTE DTE Transmit Signal Element Timing B 12 114b DB B AA 114b V 11 DCE DTE DCE Transmit Signal Ele...

Page 33: ...00m on 26 AWG 600m on 24 AWG 2 Internal G 703 module configuration JP1 Short for 128Kbps Proprietary JP1 Open for 64Kbps G 703 Codirectional 3 Internal G 703 module configuration J15 Short Right for G...

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