Assessments - 1, GPA: 4
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If the READY indicator fails to illuminate or if you are unable to place or receive calls, see the section Troubleshooting on page 11. 8 NT1 ACE User Manual 6120301 9L1-1 NT 1 ACE User Manual Short Passive Bus Configuration This configuration allows you to connect up to eight TEs at any point on the bus. The bus length is limited to 600 feet, as shown in Figure 5. To select the Short Passive Bus configuration, the CONFIGURATION switch must be set to the SHORT position. The bus terminating resistors can be placed at any point along the bus. If the TEs have internal terminating resistors that can be optioned, only one TE’s termination resistor should be enabled. The TERMINATION switch should be placed in the 100 position, and only one of the TEs connected should be terminated with 100 ohm. If the unterminated TEs are placed within 20 feet of the NT1, the TERMINATION switch should be in the 50 position, and the TEs should not be terminated. These switch settings should always be maintained, unless an external 100 ohm resistor is being used. If an external terminating resistor is used, set the TERMINATION switch to the NONE position. 600 Feet Figure 5. Short Passive Bus Configuration 61 203019L1-1 NT1 ACE User Manual 9 NT 1 ACE User Manual Extended Passive Bus Configuration This configuration allows you to connect up to eight TEs at greater ranges than the Short Passive Bus. This group of TEs can be located at up to 3000 feet from the NT1, as shown in Figure 6. To select the Extended Passive Bus configuration, the CONFIGURATION switch must be set to the LONG position. A termination resistor must be centrally located to the TEs. If the TEs have internal terminating resistors that can be optioned, only one TE’s terminating resistor should be enabled. The TERMINATION switch should be placed in the 100 position, and only one of the TEs connected should be terminated with 100 ohm. These switch settings should always be maintained, unless an external 100 ohm resistor is being used. If an external termination resistor is installed, set the TERMINATION switch to the NONE position. Figure 6. Extended Passive Bus Configuration 10 NT1 ACE User Manual 6120301 9L1-1 NT1 ACE User Manual Troubleshooting If your NT1 ACE does not operate properly, please check the lists of symptoms and solutions below. For further assistance, please contact ADTRAN technical support at 888-4ADTRAN. POWER indicator does not illuminate. • Verify power connection. • Move power supply to another circuit. • Call ADTRAN technical support for assistance. ERROR indicator illuminated; READY indicator flashes at a faster 8 Hz rate. Network activation failure: • Wall jack wiring is incorrect: Check wall jack. • Problem with ISDN line: Contact telephone company. ERROR indicator illuminated; READY indicator flashes at a slower 1 Hz rate. Local bus failure: • TE not connected: Connect TE. • TE not receiving power from NT1: Consult TE documentation. • TE not terminated properly: Review the section Setting the Option Switches on page 4. 61 203019L1-1 NT1 ACE User Manual 11 NT1 ACE User Manual READY indicator does not illuminate. • Problem with ISDN network: Contact telephone company. • ISDN line not plugged into NETWORK jack: Plug ISDN line into NETWORK jack. Unable to make or receive a call. • TE is not compatible with ISDN network: Contact telephone company. Specifications Network Interface (U) Line.............................2-Wire (Tip and Ring) Operating Mode..........Full-Duplex Data Rate....................160 kbps total, 1 44 kbps to customer Signal Format...............2B1Q Output Amplitude.........2.5 volts, zero-to-peak Tx Source Impedance ....As per ANSI T1.601 Rx Source Impedance....As per ANSI T1.601 Receiver Sensitivity........As per ANSI T1.601 Customer Interface (S/T) Line.............................4-Wire (Tx and Rx Pair) Operating Mode..........Full-Duplex Data Rate....................192 kbps total, 1 44 kbps to customer Signal Format...............Alternate Mark Inversion, 100% duty cycle Output Amplitude.........0.75 volt, zero-to-peak Tx Source Impedance ....As per ANSI T1.605 Rx Source Impedance....As per ANSI T1.605 Receiver Sensitivity........As per ANSI T1.605 12 NT1 ACE User Manual 6120301 9L1-1 NT1 ACE User Manual Faceplate Indicators ERROR.................. U-interface or S/T interface not ready READY..................Steady light - Network ready to place a call 8 Hz (faster) flashing - U-interface not ready 1 Hz (slower) flashing - S/T interface not ready POWER................ Unit has power Network Compatibility Interface................ ISDN Mechanical Size......................6.25" wide, 3.75" long, 1.35" high Weight.................9.5 ounces Mounting............... Wall or desktop Power -48 VDC................ 1.1 W dissipation Sources S/T power up to 8.9 W Environmental Temperature..........0 to 40 °C (32 to 104 °F) operating -20 to 70 °C (-4 to...
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