Black Box CAT3 - Manual (Page 2)

2 of 4 11/28/2007
#22660 724-746-5500 blackbox.com
FEATURES
• CAT5 cables support high-bandwidth
(to 100 MHz), high-speed communications
over data and voice circuits (CAT5).
• CAT3 cables can be used to expand PBXs
in voice circuits.
• Choose from male or female 50-pin telco
to blunt-cut open end, male 50-pin telco,
or female 50-pin telco terminations.
OVERVIEW
The CAT5 25-Pair Telco Connector Cables support high-
speed communication network applications with bandwidths
up to 100 MHz, including ANSI ASC X3T12 TP-PMD, ATM,
and ISDN.
The CAT5 cables conform to ANSI/TIA/EIA 568-A CAT5
requirements including Power Sum Near-End Crosstalk
(PS-NEXT). Underwriters Laboratories (UL
® ) lists the cables
as Communications Cable Type CMR 75C, for installation
as general building wiring in accordance with the National
Electrical Code (NFPA 70), and has verified them to CAT5.
The cables are also CSA certified as Communications Cable
Type PCC 60C FT4 in accordance with the National Building
Code of Canada.
The CAT3 cables can be used to expand PBXs in office
phone systems.
Each CAT5 or CAT3 cable’s core consists of 25 twisted
pairs cabled together. Each pair has two 24 AWG copper
conductors, twisted together with varying lays to reduce
crosstalk.
The PVC cables’ jacket material is flame-retardant PVC,
and a ripcord is located under the jacket. You can also choose
from cables with plenum jacketing.
All cables are terminated with a male or female 50-pin
telco connector at one end and your choice of a male 50-pin
telco connector, a female 50-pin telco connector, or no
termination at all (a blunt-cut open end) on the other end.
They are available with AMP or AVAYA style connectors.
AMP Style
1 ———— 2
3 ———— 4
6 ———— 5
8 ———— 7
10 ———— 9
11 ———— 12
14 ———— 15
16 ———— 17
18 ———— 19
20 ———— 21
22 ———— 23
24 ———— 25
26 ———— 27
28 ———— 29
30 ———— 31
32 ———— 33
34 ———— 35
36 ———— 37
39 ———— 40
41 ———— 42
43 ———— 44
45 ———— 46
47 ———— 48
49 ———— 50
13 ———— 38
NOTE: Pairs 13 and 38 are skipped.
AVAYA Style
1 ———— 26
2 ———— 27
3 ———— 28
4 ———— 29
5 ———— 30
6 ———— 31
7 ———— 32
8 ———— 33
9 ———— 34
10 ———— 35
11 ———— 36
12 ———— 37
13 ———— 38
14 ———— 39
15 ———— 40
16 ———— 41
17 ———— 42
18 ———— 43
19 ———— 44
20 ———— 45
21 ———— 46
22 ———— 47
23 ———— 48
24 ———— 49
25 ———— 50
TECH SPECS FOR CAT5 25-PAIR
TELCO CONNECTOR CABLES
Attenuation — Nominal: 20.2 dB/100 m @ 100 MHz;
Maximum: 22 dB/100 m @ 100 MHz
Cable Type — 25-pair UTP
Conductors — 24 AWG, bare copper, 0.020" nominal diameter
DC Resistance — 9.38 ohms/100 m maximum
Impedance — 100 ± 15 ohms
Insulation — HDPE
Jacket — Gray PVC: 0.032" nominal wall thickness, 0.5" nominal diameter;
Ripcord located under jacket
Mutual Capacitance — 5.6 nF/100 m nominal
PS-NEXT — Worst case: 32 dB @ 100 MHz
Standards — TIA/EIA 568-A
Velocity of Propagation — 75% nominal
Connectors — AMP or AVAYA style