TEMPO TM900 DigAlert Pro Telephone Test Set Instruction Manual
- June 9, 2024
- Tempo
Table of Contents
TEMPO TM900 DigAlert Pro Telephone Test Set Instruction Manual
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.
The TM900 not only works in handset mode, but can also be used as a “two-way” hands-free speakerphone. Enclosed in a Nautilus family enclosure which is tough, dust and weathertight .
Features
- Complete telephone set with ringer and hands-free speakerphone
- Phone-to-phone intercom
- Amplified loudspeaker line monitor
- Dig Alert™ digital service protection system
- Tone and pulse dialing
- Large 10-location speed dialing memory
- Multi-memory redial
- DTMF digit detection
- Tone output mode
- Caller ID with name display
- Call waiting caller ID
- Missed call indication
- DSL compatible
- Glow-in-the-dark keypad
- Line voltage and current display
- High voltage detect and lockout
- High current detect and lockout
Key Specifications
- Bellcore and ETSI caller ID compatible
- User-selectable ANSI, ETSI, or custom telephone performance
- High voltage alert (110 VDC)
- High current alert (125 mA)
Safety
Safety is essential in the use and maintenance of Tempo tools and equipment. This instruction manual and any markings on the tool provide information for avoiding hazards and unsafe practices related to the use of this tool. Observe all of the safety information provided.
Purpose of this Manual
This manual is intended to familiarize personnel with the safe operation and maintenance procedures for the TM900 DigAlert™ Pro Telephone Test Set.
Keep this manual available to all personnel. Replacement manuals are available upon request at no charge at www.TempoCom.com.
Do not discard this product or throw away!
For recycling information, go to
www.TempoCom.com.
Important Safety Information
SAFETY ALERT SYMBOL
This symbol is used to call your attention to hazards or unsafe practices which could result in an injury or property damage. The signal word, defined below, indicates the severity of the hazard. The message after the signal word provides information for preventing or avoiding the hazard.
Danger
Immediate hazards which, if not avoided, WILL result in severe injury or death.
Warning
Hazards which, if not avoided, COULD result in severe injury or death.
Caution
Hazards or unsafe practices which, if not avoided, MAY result in injury or property damage.
Warning
Read and understand this material before operating or servicing this equipment. Failure to understand how to safely operate this tool could result in an accident causing serious injury or death.
Warning
Electric shock hazard:
Contact with live circuits could result in severe injury or death.
Warning
Electric shock hazard:
Environment: Do not use in wet conditions. Do not connect to network if
apparatus is wet. This device is rated to IP67.
Failure to observe this warning could result in severe injury or death.
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.
Important Safety Information
**Warning**
When in Loudspeaker mode, hold loudspeaker more than 30 cm (1 foot)
from your ear.
Misuse could result in hearing damage.
**Warning**
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
Caution
- This unit is to be used by trained personnel only.
- Do not perform any service or maintenance other than as instructed in this manual.
Failure to observe these precautions may result in injury or property damage.
Caution
Inspect the test set and cord for wear or damage. Replace worn, damaged, or
missing components with Tempo replacement parts. A damaged component may fail,
resulting in injury or property damage.
If the equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
Important
Replace weak or discharged batteries as soon as either of these conditions is detected.
Identification
-
TALK
-
MONITOR
-
MUTE
- A. Positive or Tip (Black)
- B. Negative or Ring (Red)
Setup
Battery Installation
Warning
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.
When a battery is first installed, the unit will default to a Language Setup display (Figure 1). Select a language before using the unit.
To access the battery compartment, loosen the three screws, one at the top and
two near the belt clip & remove the battery cover off. Insert the new alkaline
battery, check that the polarity is correct before snapping in place. Replace
the cover and re-tighten the screws. (Do not overtighten the screw.)
Low Battery Warning
When the battery voltage becomes low, a warning sound is produced each time the mode switch position changes. In addition, a small battery icon is displayed in the lower left of the screen. If the battery voltage is allowed to drop below a critical level, the unit will remind you to replace the battery for a few seconds and then return to standby mode.
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 Press the digit corresponding to the desired option to choose
it. To leave this mode, press 0** (back) repeatedly. An invalid entry will
result in an error tone.
Talk Mode
Caution
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. This key generates a timed line break, which simulates a hook flash to activate special features of a PBX or central office (Figure 2).
The flash duration is user-selectable via the Setup mode as 100 ms, 270 ms, or the default of 600 ms. The symbol is present on the bottom line of the display during Flash operation and for 2 seconds afterward.
Off-Line Dialing and Automatic Redial of Last CID Number
Digits entered by hand or received by calling line ID in Monitor mode are dialed automatically upon switching to TALK. Any displayed number can be cleared by pressing and holding MUTE for 1 second. Short presses of MUTE act as a backspace, allowing errors to be corrected before switching to TALK to dial.
Pause
The dual function LNR/Pause key inserts an inter-digit delay of 3 seconds between digits dialed. The pause digit is displayed as “–” (minus sign) on the LCD and is stored in memory. Note that if this were the first key pressed, this would recall and immediately dial LNR (see “Memory Functions”).
Pulse Dialing Option
To make a call using pulse dialing, press and hold the key to select Pulse mode. Then either dial or recall from memory the number to be called. The symbol is displayed on the bottom line of the display. The dialing mode is changeable from Pulse to Tone while dialing by pushing the key. Such mid-call transitions of dialing mode are stored and shown as in the stored digit sequence, indicating the requested change to Tone mode (Figure 3).
Current Measurement
While the TM900 is off-hook, the line current is displayed along with the polarity.
Over Current Protection
When the TM900 is off-hook, it protects against line current over 125 mA by automatically applying a current limit. If the condition is maintained for more than about half a second, the unit goes on-hook, a warning message is displayed, and a warning sound is produced until the unit is disconnected from the line or switched off (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. Note that the microphone is automatically muted if you are in Talk or Intercom modes, and is displayed whenever the speaker is active to remind you that two-way speech is not possible. The speaker remains on for the whole duration of a call, and is kept on while switching to another mode. Automatic power-down turns the speaker off (see “Automatic Power Down” below).
Volume Control
Long press the Volume/Speaker key and the volume will toggle from high to low or vice versa.
Monitor Mode
Press the MONITOR button, the unit will be on-hook. This mode provides a high impedance connection that enables the user to listen to the line without loading it (Figure 5).
Monitor mode also constantly monitors and displays the line voltage along with the polarity. With the red lead attached to ring and black to tip, the display shows negative “–” voltage. In the presence of incoming ring, the display provides line status information with caller ID if present, and a ringing alert signal is produced from the loudspeaker.
DTMF Detection Mode
To enter DTMF Detection mode, press *** and # simultaneously while in Monitor mode, and then select option 2** from the menu.
This mode detects the DTMF tones generated by another unit (for example an alarm autodialler) when it is actively dialing. This mode can also be used to check incoming DTMF caller ID.
Toner Mode
To enter Toner mode, press *** and #** simultaneously while in Monitor mode, and then select option 3 from the menu.
This mode transmits a tracing tone at the line terminals, which is compatible with Tempo’s filter probe key frequencies. Two different speed cadence tones are selectable by selecting 1 or 2 in the Toner menu.
Over Voltage Warning
The unit is protected against operating in Talk mode when voltages exceed 110 V. A warning tone will be generated and the screen will display the message “Over-voltage!” (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.
Answering Incoming Call
While the TM900 is ringing, press the TALK button
Note: The TM900 will not allow off-hook if ringing is continuous. Check the frequency reported on the screen; if the frequency is approximately 50 Hz to 60 Hz, carefully disconnect from the line.
Automatic Power Down
To extend battery life, the TM900 powers down after periods of no user interaction in all modes, except active Talk mode.
- Talk mode with no DC detected: 5 minute timeout
- Talk mode with DC detected: No timeout
- Intercom mode: 60 minute timeout
- Monitor mode: 15 minute timeout
The TM900 can be re-activated following a timeout by pressing monitor , talk , speaker buttons , or connecting to DC (powered line).
Intercom (Local Battery) Mode
The Intercom mode is a feature that allows two TM900 test sets to communicate without any telephone service available. In this mode only speech signals pass over the telephone pair, and no DC power (talk battery) is available. The Smart Intercom feature only works with other TM900, TM-700 or PE-830 test sets. The intercom feature only works if there is no voltage on the line (Figures 8–10).
To activate either Intercom mode, activate MONITOR mode and press the Flash key. You will be presented with the menu shown in Figure 8; by default Smart Intercom will be selected. To begin the call and ring the far end, press TALK.
If you are making a Smart Intercom call, when the distant unit recognizes the call request you will hear a regular ring-back tone from the earpiece. If there is no reply from the distant unit, after a few seconds you will hear an error beep.
Incoming SmartIntercom call alerts will be received in either Off or Monitor mode; you do not need to be in Intercom mode to receive the alerting signal.
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.
To leave Intercom mode, simply move the mode switch from TALK to MONITOR. A callcompleted tone is sent down the line as you do this to alert the other user.
Memory Functions
Memory and store facilities are available in Talk and Monitor modes. There are 10 memory locations for number storage and a multi-number “last number redial” store. These can be accessed as described below.
Last Number Redial
When in Monitor mode, the Redial key offers the user the ability to recall any of the last 10 numbers dialed or received by CLID on the unit. The numbers can be accessed by repeatedly pressing the Redial key with number information displayed on the LCD. This number will be automatically dialed out when the switch is placed back to the Talk mode (Figure 11).
In Talk mode the Redial key offers the last number dialed (or last CLID) only if no other digits have already been dialed. After dialing any digits, this key becomes the Pause key.
Saving Speed Dial Number
Enter a number or leave an incoming ID message on the screen. Push the Phonebook key twice to enter the store mode, and then enter the key number (0–9) to save the number to a memory location ( **Figures 12–14)
**
Recall Speed Dial Number
Push the Phonebook key once followed by the key number (0–9) (Figures 15–17). In addition to direct access by pressing the corresponding number while on-hook in Monitor mode, repeatedly pressing the Phonebook key allows you to scroll sequentially through all 10 stored numbers. In all cases the number remains displayed, allowing automatic dialing by simply switching to TALK.
Note: If a location recalled is unused, then no number will be displayed.
Caller ID
CID and CIDCW information will be displayed in Monitor and Talk modes, when available. Error messages are displayed when the CID is detected but not received in full, is corrupted, or is of an incompatible type (Figures 18–19).
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. This avoids problems where using speaker-phone in a noisy environment, such as near a busy road. In such situations the MUTE control helpfully becomes a type of “press to talk” (PTT) button.
If the speaker is activated when the unit is in MONITOR mode then any received audio will be amplified.
To change the volume, press and hold the “Volume/Speaker” button until a beep is heard (low tone for low level, high tone for higher volume).
Specifications
-
Telephone Compatibility: TIA/EIA-470-B and ETSI
-
Storage Temperature: -10 °C to +70 °C (14 °F to 158 °F)
-
Operating Temperature: 0 °C to +50 °C (32 °F to 122 °F)
-
Humidity: Up to 90% operating, 95% storage, both with no condensation
-
CID and CIDCW: Bellcore TR-NWT-000030 (GR30) and SR-TSV-002476
-
Battery Life: Over 6 months of typical use; only alkaline types recommended; remove batteries if storing unit for long periods
-
Loop Limits (at 48 V):
- Resistance: >5 kΩ
- Minimum Current: <10 mA
-
DC Resistance :
- Off-hook: <300 Ω
- On-hook: >10 MΩ
-
Monitor Impedance: >400 kΩ
-
Pulse Dialing :
- Rate: 10 pps or 20 pps
- Break: 60% or 66%
- Inter-digit Pause: 800 ms (leakage during break >1 M)
- DTMF/Tone: -4 dBm / -6 dBm (ANSI); -9 dBm / -11 dBm (ETSI)
-
FSK Caller Name/Number and Call Waiting:
-
Bellcore GR-30-CORE, TR-NWT-000030
ETSI FSK types -
Displays: Called DN, Caller name
-
Soft Key Function (on two context-sensitive keys):
-
Flash/Timed Break Recall: 100 ms, 270 ms, 600 ms
-
-
Memory Dialing: 10 memories, 10 LNR
Indicators:- LCD (96 x 48 pixels, 5 lines) displays the following:
- Caller ID (name and number) and Call Waiting Dialed number
- Over-voltage conditions
- 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
Note: Replace the battery in less than one minute to retain the contents of the memory.
- Disconnect the unit from the circuit.
- Press MONITOR to go to off mode.
- Loosen the three screws and the cover.
- Replace the battery or cord set, as shown. Observe polarity. (Red/Black, +/–)
- Replace the cover and tighten the screws.
Note: Skipping Steps 1 and 2 may cause the unit to malfunction. If the
test set does not restart after changing the battery, disconnect the battery
for two minutes. Then proceed with Step 4.
Maintenance
Changing Line Cord
- Disconnect the unit from the circuit.
- Remove the battery cover as detailed above.
- Replace the line cord and reconnect.
- Replace the cover as detailed above.
- A. Positive or Tip (Black)
- B. Negative or Ring (Red)
- C. Earth Ground (Green)
Cleaning
For cleaning it is recommended to only use a cloth dampened with a solution of soap and water.
Glossary
On-hook / Monitor: The phone line is available for listening
only.
Off-hook / Talk: The phone is activated.
Line Current: The amount of current fed from the telephone line when off
hook, in milliamperes (mA).
Flash: A momentary line current break used by the butt set to signal the
phone system for special function.
Costumer Support
Tempo Communications
1390 Aspen Way • Vista, CA 92081 • USA
800-642-2155
Tempo Europe Ltd. • Brecon House, William Brown Close
Cwmbran, NP44 3AB, UK • Tel: +44 1633 927 050
www.TempoCom.com
