• Display—backlit LCD and glow-in-the-the dark keypad.
• DataSafe Pro—superior high-impedance monitoring, lockout and override, making you completely safe in any mode; DropSafe—passes 20-foot drop test; RainSafe–designed for use in rain conditions.
• DSL/POTS Filtering Technology—allows technicians to clip on a live DSL line to test POTS service without downing or disrupting data service.
• 2-way hands-free speakerphone—for true hands-free conversation.
• Test Functions: (1) Data indication—warns when data is present; (2) Voltage indication—troubleshooting feature to identify potential line problems; (3) Current (mA) indication—verifies sufficient line current; (4) Caller-ID—verifies service is functional; (5) DTMF Digit Grabbing—isolate faulty customer premise equipment.

The Fluke Networks TS52 Pro telephone test set, available with various line cord connectors to suit specific applications, is designed for outside use to detect dial tone and polarity, place and receive calls, indicate line voltage and current, and verify caller ID service; has a two-way, adjustable-volume speakerphone for hands-free conversation during testing of telephone lines; tests POTS (plain old telephone service) quality on live DSL lines without disrupting data services; and stores up to ten 23-digit telephone numbers which can be speed-dialed via the keypad. It provides tone or pulse operation. The test set has two basic modes of operation: talk mode for off-hook operations including verifying dialing and receiving calls, and monitor mode for on-hook operations including checking for an idle line, listening for line noise, measuring DC voltage on the line, and capturing DTMF (dual-tone multi-frequency) tones to check for proper signaling. In monitor mode, the test set provides high-impedance monitoring of lines without disrupting service. When sw to talk mode, the data lockout feature tests the line for high-speed data signals and remains on hook and beeps if such signals are detected. The lockout can be overridden to pull dial tone from a noise line. This test set meets IEC (International Electrotechnical Commission) safety standard 61010-1:2010 and is rated for CAT I installations to 300 VDC, which covers equipment on circuits not directly connected to mains. It passes a 20-foot (6 m) drop test and resists rain and moisture. The high-visibility glow-in-the-dark keypad has 12 standard dialing keys including star and pound, and function keys to store, recall, and redial numbers and to pause for accessing a second dial tone when dialing through a PBX (private branch exchange), among other functions. A backlit LCD tracks functions and test status, and displays line voltage from 0 to 140 VDC and current from 0 to 120 mA. At a voltage greater than 140 VDC, the test set locks out and will not allow off-hook operation. The test set is made of high-impact plastic and turns on automatically when clipped to an active line. A spring-loaded belt clip provides a secure hold on belt loops and D-rings and can be attached to either end of the test set. Additional specifications ( https://images-na.ssl-images-.com/images/G/01/BISS/FlukeNetworks/Fluke_Networks_TS52_TestSet.user_guide.pdf#page=28 ) include various environmental operating conditions. Telephone test sets, also called butt sets, are used by telecom technicians to troubleshoot and maintain copper-wire voice-subscriber lines. SpecificationsLine current rangeOff-hook: 10 to 100 mADC resistanceOff-hook: 150 Ω (nominal); on-hook: greater than 3 MΩAC impedanceOff-hook: 600 Ω (nominal), 300 to 3400 Hz; on-hook: greater than 120 kΩ, 300 to 3400 HzRotary dial pulse rate10 + or – 1 pulses per secondDTMF (dual-tone multi-frequency) tone frequency error+ or – 1.5% maximumMemory capacityTen 23-digit speed-dial numbers, one redial numberSafety ratingsComplies with ANSI/ISA (American National Standards Institute/International Society of Automation) 82.02.01 (61010-1) 2004, Canadian Standards Association CAN/CSA-C22.2 No 61010-1-04, UL (Underwriters Laboratories) 61010-1 (2004), and IEC (International Electrotechnical Commission) 61010-1:2010 for CAT I, 300 VDC, degree 2Agency certifications and standards metCE (European Conformity) marking; conforms to relevant Australian EMC requirements and Canadian Standards Association standardsPower sourceShared line power; 9V battery (included) for test set when on-hook, for LCD, and for speaker when off-hookDimensions254 x 96 x 107 mm/10 x 3.75 x 4.25 in (H x W x D)Weight0.68 kg/1.5 lb *H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back. Datacom and telecom installation and test devices, such as toners and test sets, check cabling and wiring to help ensure proper connections and operation. Tone generator and probe sets, also called toners, are used to locate, trace, and isolate cables in copper media networks. Telephone test sets, also called butt sets, are specialized telephones that connect to telephone lines to check for proper operation and to isolate trouble. Some test sets incorporate a TDR (time-domain reflectometer) and toner for determining cable length and locating faults. While certain devices may be used on live networks, others are only suitable for inactive networks. Field technicians and installers use these devices to set up, maintain, and troubleshoot datacom and telecom cabling within a building or in outside (OSP) applications. Fluke Networks manufactures tools for network infrastructure installation, testing, certification, and troubleshooting, in copper, fiber, and wireless networks, with its tools widely used by contractors, enterprises, and communication service providers. The company, which operates globally, is based in Everett, WA. What's in the Box? ------------------ * Fluke Networks TS52 Pro telephone test set * Test leads with Angled Bed-of-Nails and Piercing Pin Clips * 9V battery * Instructions