Comtran 25 Pair Telephone Cable Cat 3 CMP/Plenum White – 100% US Made (per foot)

Reference#: 69278
Item#: CT-32631


25 Pair Category 3 Plenum Rated Cable

Cat3 Plenum 25 Pair Cable is ideal for voice applications and is commonly used for telephony purposes. It has fewer twists then Cat5e which makes it easier to work with when punching it down. It also has no spinal divider like the Cat6 cable does. Cat3 plenum is mandatory to use where a plenum fire rating is required. It has a Teflon jacket rather than polyvinyl chloride (PVC) and gives off less toxic fumes in a fire. Our Cat3w Plenum cable is American made and of a much higher quality then some of the imported cable that's available online.

This made in the USA cable will qualify for all product-origin specific United States Federal Government sales requirements.

What is plenum cable?

The plenum is hidden space within a building which is used for HVAC (Heating, Ventilation, and Air Conditioning) and to run cables. Plenum space is normally above a suspended ceiling or under a raised floor. Buildings without plenum spaces will have cabling and HVAC ducts within plain view. The plenum space is normally used to accommodate the communications wires for the building's computer and telephone network. Recent studies have shown that wiring and cabling within the plenum space could be dangerous and be exposed to fire/burning possibilities.

Through our many manufacturer contacts we have access to other types of 25 pair telephone cable that are not listed on this website. There are too many part numbers to list, but we can get you almost any type of indoor or outdoor 25 pair telephone cable as well as 25 pair data cable, from direct burial gel-filled, direct burial non gel-filled, aerial cable with and without support wire, PE89, PE22, PE38, armored cables, various conductor sizes from 19 gauge to 24 gauge, as well as Cat 5 25 pair in various constructions. Most all of this can be cut to length to suit your needs. For more information and pricing on any of these email us at

When you order your 25 pair telephone cable and other items from, you're benefiting from our combined 20+ years of vendor relationships, so you will be rewarded with great pricing and service on high quality products.


Suitable for:
4Mbps Token Ring (IEEE 802.5)
10 Base-T (IEEE 802.3)
52 Mbps ATM


25 Pair Telephone Cable Color Coding is as Follows:

1 white/blue
2 blue/white
3 white/orange
4 orange/white
5 white/green
6 green/white
7 white/brown
8 brown/white
9 white/slate
10 slate/white
11 red/blue
12 blue/red
13 red/orange
14 orange/red
15 red/green
16 green/red
17 red/brown
18 brown/red
19 red/slate
20 slate/red
21 black/blue
22 blue/black
23 black/orange
24 orange/black
25 black/green
26 green/black
27 black/brown
28 brown/black
29 black/slate
30 slate/black
31 yellow/blue
32 blue/yellow
33 yellow/orange
34 orange/yellow
35 yellow/green
36 green/yellow
37 yellow/brown
38 brown/yellow
39 yellow/slate
40 slate/yellow
41 violet/blue
42 blue/violet
43 violet/orange
44 orange/violet
45 violet/green
46 green/violet
47 violet/brown
48 brown/violet
49 violet/slate
50 slate/violet

Voice, T1, 4Mbps Token Ring (IEEE 802.5) 10 Base-T (IEEE 802.3) 52 Mbps ATM, VG-AnyLAN

Compliances: UL Listed Type MPR/CMR ANTI/TIA/EIA 568-B.2 (Cat3)

Conductor: Annealed Copper

Insulation: Plenum

Sheath: Plenum to White

Electrical Characteristics DC Resistance (max) 9.38 Ohms/100m @ 20C
Mutual Capacitance (nom) 18 pF/ft @ 1 kHz
Characteristic Impedance 100 +/- 15 Ohms from 1.0-16.0 MHz

Structural Return Loss (SRL):
12dB (min) from 1.0-10.0 MHz
12-10 log (f/10) from 10.0-16.0 MHz

Voltage Rating: 300V