KOONTECH KNSP-22 is a type of economical and waterproof, moisture
proof dust proof telephone .
It’s apply to highway, tunnels, power plants, gas stations, mines,
docks, steel companies, large-scale projects for waterproof,
Moisture proof, dust proof and other environments which have
special requirements. It is very cost-effective products for the
owners and construction. It can operate stably at 24V-60V voltage.
ringer sound is also higher than the national standard. The
telephone can multiple connection to share a same number with other
terminals to save a lot of resources for construction units and
1. KNSP-22 Product Features.
1. Shell: PC material with high strength and elasticity, wide high
impact strength, wide service temperature.
2. Hook: stainless steel, using magnetic induction hang up, don’t
need hook switch, no contact gaps.
3 . Buttons: metal buttons, abrasion-proof and anti aging. (Can be
customized back lit keyboard)
4.Display: This model is IP version supports Caller ID or IP
address of the display. (Can be customized according to standard
GSM CDMA, etc.)
5.Handset: special ABS, / PC synthesis, integrated structure, good
sealing, resistance to knock ,twisted pull no deformation, doesn’t
burst at -35 centigrade.
6. Wire: using Teflon wire, acid and alkali resistance, high
temperature, anti-aging, do not catch fire.
7. Waterproof glueimported waterproof glue, high viscosity, high
temperature resistance, high pressure, waterproof life more than 10
8. Transmitter and receiver of handset ,keyboard, buzzer,circuit
board ,shell , all accessories use multi-layer waterproof and
dust-proof structure. It has three-level waterproof, dust proof
functions, the whole rating reach to IP66.
9. Telephone is very stability, strong anti-jamming capability, In
line with the national standard GB / T 15279-94.
2. The operation uses
1. The way of pick up/ hang up: handset controlwhen you pick up
handset telephone will put through. When you hang up, the telephone
2. Answer the phone: When a call come in, the phone will ring.
Picking up the handset and you can talk each other, After the call
to hang back handset.
3. Call: pick up the handset , according to the way of ordinary
telephone to dial and talk with each other.
4. Store number: pick up the handset and press the "Save" key,
press the number that you want ; Press the Save again . press the
"0-9" one of button to store the number as an address, at last hang
up the phone . (This feature needs 16 keyboard support)
5. Extract number: Pick up the handset, press the "Extract" button,
press "0-9" one of button to dial the memory number. (This feature
needs 16 keyboard support)
3. The main technical parameters
1. It’s suitable for a variety of feed voltage PBX switches and
dispatch and scheduling of the switching system 24-48V.
2. Temperature: -35~ 75 ℃,Relative Humidity: 10% to 95% Atmospheric
pressure: 86 ~ 106 Kpa, Ambient noise70dB (A).
3. Ringing level75dB.
4. When the user is 3KM line signal level standard frequency: low
frequency group: 697-941Hz high frequency group: 1209-1477Hz
Frequency Offset: less than1.5% of the combined signal of
high-frequency level difference: 21dB by the total harmonic
distortion caused by intermodulation at least lower than the basic
level of 20dB.
5. Call transfer indicators: SLR≤12, RLR≤-1, STMR≥10, output
6. 12 groups with superior storage memory dialing numbers (each
number up to 16).
7. 0.8mm cable core wire, subscriber line can be 7 KM
8. Can operate stably at 24 V-60V of voltage. Ringer sound is also
higher than the national standard,The telephone can join together
and use a same number so save a lot of resources for construction
units and owners. . Please contact customer service person and