NST2602 INTRODUCTION TO STATISTICAL
METHODS DATA ANALYSIS CASES AND
STEP BY STEP EXPLANATIONS 2026 STUDY
GUIDE
◉ In the customer premises, what could cause some dual tone
multifrequency (DTMF) touch-tone telephones to have continuous
dial tone caused by polarity reversal, but not other DTMF telephones
Answer: The telephone wiring polarity is incorrect, and the
customer has a mix of older and newer DTMF touch-tone telephones
◉ What should be checked as a possible cause of hum on a
customer's telephone line
Answer: Shielding problems in the station wiring, poor
terminations, or poor grounding and bonding connections
◉ What is the difference between the wiring configurations for a
residential 8-position, 8-contact(8P8C) modular plug and jack in the
Universal Service Order Codes (USOC) and ANSI/TIA/EIA 570-B
Answer: The placement of pair numbers 3 and 4
◉ How is silver satin cable used to connect telephone equipment to
wall outlets typically pinned
,Answer: Reversed at opposite ends, or cross-pinned
◉ In unshielded twisted pair (UTP) cable, what is the term that
describes when an information-carrying conductor makes contact
with a grounded conductor
Answer: Ground Fault
◉ After resolving the problem with the premises wiring issue, which
of the following is the next step in the six-step process that the tech
should take
Answer: Verify that the problem has been resolved and that phone
service is running perfectly on all phones
◉ If the telephone wiring is in the bus topology and the twisted-pair
cable tester is connected at the embedded multimedia terminal
adapter (EMTA) with the remote unit connected to the last outlet in
the loop, what is the quickest way to locate the incorrectly wired
outlet if the tester indicates a wiring error?
Answer: Break the loop into smaller sections and retest the two
sections to identify which one has the wiring error. Continue to
divide the section with the error into smaller sections until the
wiring error is identified
◉ How should the digital multimeter (DMM) be used to
troubleshoot problems in the telephone wiring?
, Answer: Use the voltmeter function; both the network interface
device (NID) and the embedded multimedia terminal adapter
(EMTA) provide a steady on-hook voltage
◉ What is it called when several computers are sharing files without
a WAP
Answer: Ad-Hoc Mode
◉ What is the standard encryption method used with WPA2
Answer: AES
◉ When configuring a wireless router, why is changing the service
set identifier (SSID) from the device default recommended
Answer: To avoid telling hackers exactly what the device is
◉ Which mode uses a wireless access point (WAP) connected to a
wired network
Answer: Infrastructure
◉ In regard to Wi-Fi networks, what is WPS used for
Answer: To enable connection to a Wi-Fi network without a
Windows interface
METHODS DATA ANALYSIS CASES AND
STEP BY STEP EXPLANATIONS 2026 STUDY
GUIDE
◉ In the customer premises, what could cause some dual tone
multifrequency (DTMF) touch-tone telephones to have continuous
dial tone caused by polarity reversal, but not other DTMF telephones
Answer: The telephone wiring polarity is incorrect, and the
customer has a mix of older and newer DTMF touch-tone telephones
◉ What should be checked as a possible cause of hum on a
customer's telephone line
Answer: Shielding problems in the station wiring, poor
terminations, or poor grounding and bonding connections
◉ What is the difference between the wiring configurations for a
residential 8-position, 8-contact(8P8C) modular plug and jack in the
Universal Service Order Codes (USOC) and ANSI/TIA/EIA 570-B
Answer: The placement of pair numbers 3 and 4
◉ How is silver satin cable used to connect telephone equipment to
wall outlets typically pinned
,Answer: Reversed at opposite ends, or cross-pinned
◉ In unshielded twisted pair (UTP) cable, what is the term that
describes when an information-carrying conductor makes contact
with a grounded conductor
Answer: Ground Fault
◉ After resolving the problem with the premises wiring issue, which
of the following is the next step in the six-step process that the tech
should take
Answer: Verify that the problem has been resolved and that phone
service is running perfectly on all phones
◉ If the telephone wiring is in the bus topology and the twisted-pair
cable tester is connected at the embedded multimedia terminal
adapter (EMTA) with the remote unit connected to the last outlet in
the loop, what is the quickest way to locate the incorrectly wired
outlet if the tester indicates a wiring error?
Answer: Break the loop into smaller sections and retest the two
sections to identify which one has the wiring error. Continue to
divide the section with the error into smaller sections until the
wiring error is identified
◉ How should the digital multimeter (DMM) be used to
troubleshoot problems in the telephone wiring?
, Answer: Use the voltmeter function; both the network interface
device (NID) and the embedded multimedia terminal adapter
(EMTA) provide a steady on-hook voltage
◉ What is it called when several computers are sharing files without
a WAP
Answer: Ad-Hoc Mode
◉ What is the standard encryption method used with WPA2
Answer: AES
◉ When configuring a wireless router, why is changing the service
set identifier (SSID) from the device default recommended
Answer: To avoid telling hackers exactly what the device is
◉ Which mode uses a wireless access point (WAP) connected to a
wired network
Answer: Infrastructure
◉ In regard to Wi-Fi networks, what is WPS used for
Answer: To enable connection to a Wi-Fi network without a
Windows interface
