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Tempo Communications DigAlert Pro TM900 Instruction Manual

Telephone test set
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INSTRUCTION MANUAL
TM900
DigAlert Pro
TM-900
Telephone Test Set
Redial
Phonebook
Flash
Speaker
Pause
Vol
Mem
Intercom
Pulse
Read and understand all of the instructions and safety information in
this manual before operating or servicing this tool.
Register this product at www.TempoCom.com
55504689
© 2022 Tempo Communications, Inc.
10/22

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Summary of Contents for Tempo Communications DigAlert Pro TM900

  • Page 1 Telephone Test Set Redial Phonebook Flash Speaker Pause Intercom Pulse Read and understand all of the instructions and safety information in this manual before operating or servicing this tool. Register this product at www.TempoCom.com 55504689 © 2022 Tempo Communications, Inc. 10/22...

  • Page 2: Key Specifications

    Description The Tempo Communications TM900 DigAlert™ Pro Telephone Test Set is intended to assist with the installation and maintenance of complex telecom systems. A complete butt-in test set, the TM900 adds useful features such as loudspeaker monitor, caller ID, speed dial, intercom, and line voltage/current/frequency meter.

  • Page 3: Important Safety Information

    All specifications are nominal and may change as design improvements occur. Tempo Tools, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. DigAlert is a registered trademark of Tempo Communications, Inc. KEEP THIS MANUAL...
  • Page 4 Important Safety Information When in Loudspeaker mode, hold loudspeaker more than 30 cm (1 foot) from your ear. Misuse could result in hearing damage. Electric shock hazard: Before opening the case, remove the test leads from the circuit and shut off the unit. Failure to observe this warning could result in severe injury or death.
  • Page 5 TM900 Identification TM900 Redial Phonebook Flash Speaker Pause Intercom Pulse TALK MONITOR MUTE Black Wire Red Wire A. Positive or Tip (Black) B. Negative or Ring (Red)

  • Page 6: Battery Installation

    Setup Battery Installation Electric shock hazard: Before opening the case, remove the test leads from the circuit and shut off the unit. Failure to observe this warning could result in severe injury or death. The TM900 requires one 9V block battery to be installed for all functions to operate. Tempo recommends alkaline batteries, which are more leak resistant and offer much longer operating life than standard zinc-carbon types.

  • Page 7: Operation

    TM900 Operation The TM900 test set has six main operating modes: Setup, Talk, Monitor, DTMF Detection, Toner, and Intercom. Setup Mode Power up the unit in MONITOR, simultaneously press * and #. The unit then enters the special features mode. While in this menu, select option 1 to access Setup mode. Now the language and other configurable settings can be set up.

  • Page 8: Talk Mode

    Talk Mode This device is for connection to TNV3 network voltages only. Use this unit only on standard analog Telecom networks. Press the “TALK” button to enter TALK while and connected to a suitable telephone line, the unit will go off-hook. Dialing and speech are now possible. Flash While off-hook, the Flash key is enabled.

  • Page 9: Monitor Mode

    TM900 Figure 4. SmartMute™ A quick press of the MUTE button toggles the microphone off or on. A long press (over 1 second) mutes the microphone while the button is held. The mute symbol is displayed while the microphone is deactivated. Loudspeaker/Volume Key Press the Loudspeaker key at any time in Monitor or Talk modes to turn the speaker on or off.
  • Page 10 Figure 6. Elevated Voltage Warning If the unit is connected to a voltage between 80 V and 110 V, high-pitched beeps will be produced, warning that this is probably not a normal telephone line (Figure 7). This audible alarm can be disabled by pressing the MUTE button. You can also go off-hook by pressing the TALK button a second time.

  • Page 11: Memory Functions

    TM900 The intercom-alerting signal (ring tone) is a fast cadenced, higher pitched ring than normal. If this is heard, then simply press Talk to answer the call, automatically placing the TM900 into Intercom mode. A confirmation beep is produced to indicate that the Intercom mode is now active.

  • Page 12: Hands-Free Speakerphone

    Figure 18. Figure 19. Hands-Free (Speaker-phone) TM900 provides a voice switched speaker-phone function. Whilst in a call press the volume/ speaker button and speaker-phone will be activated. Note that unlike a common speaker-phone, the microphone is muted at the start of the call. Just press MUTE when you want to talk.

  • Page 13: Maintenance

    TM900 Phone status (monitor, on hook etc.) Line Voltage: 110 Vdc max Loop Current: 125 mA max Ring Frequency: 15–70 Hz Line Protection: Over-voltage: 360 Vdc continuous >500 V peak Current Limited: 125 mA Lightning: ITU K.17, 20, 21 (1500 V) Intercom Range: 6 km on typical loops Toner Output: 7 V pk-pk (square wave, on typical lines) Changing the Battery or Cord Set...
  • Page 14 (mA). Flash: A momentary line current break used by the butt set to signal the phone system for special function. Tempo Communications 1390 Aspen Way • Vista, CA 92081 • USA 800-642-2155 Tempo Europe Ltd. • Brecon House, William Brown Close Cwmbran, NP44 3AB, UK •...

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