PE Insulated ISDN Basic Access Air Core Cables
Application
The cables are used as basic access for ISDN services in central office wiring and cabling for ISDN basic access installation.
Standards
• ER.f5.058
Construction
Conductors
Solid annealed bare copper sized 0.5/0.6mm as per ASTM B-3/IEC 60228 class 1
Insulation
Solid polyethylene as per ASTM D 1248/IEC 60708
Twisted Pairs
Insulated conductors are twisted into pairs with varying lays to minimize crosstalk
Cable Core Assembly
The pairs are cabled together in layers of 12, 13 & 25 pair unit to form the cable core. Units are identified by colour coded binders
Core Wrapping
One or more non-hygroscopic polyester tapes are helically or longitudinally laid with an overlap
Sheath
PVC/LSZH
Ripcord (optional)
Nylon ripcord may be placed parallel to the cores to facilitate sheath removal
Electrical Properties
Nominal Conductor Diameter |
mm |
0.5 |
0.6 |
Conductor Gauge Size |
AWG |
24 |
- |
Conductor Size |
mm2 |
0.196 |
0.283 |
Maximum Conductor Resistance @20°C |
Ω/km |
91 |
63 |
Minimum Insulation Resistance @500V DC |
MΩ.km |
16000 |
16000 |
Maximum Resistance Unbalance |
% |
2.5 |
2.5 |
Average Mutual Capacitance |
nF/km |
52 |
52 |
Maximum Capacitance Unbalance @1KHz pair-to-pair |
pF/km |
260 |
260 |
Maximum Capacitance Unbalance @1KHz pair-to-ground |
pF/km |
2625 |
2625 |
Maximum Average Attenuation @20KHz |
dB/km |
4.9 |
3.9 |
Maximum Average Attenuation @40KHz |
dB/km |
6.2 |
4.8 |
Maximum Average Attenuation @60KHz |
dB/km |
7.0 |
5.6 |
Maximum Average Attenuation @80KHz |
dB/km |
7.7 |
6.0 |
Maximum Average Attenuation @100KHz |
dB/km |
7.9 |
6.3 |
Minimum ELFEXT pair-to-pair @20KHz |
dB |
56 |
56 |
Minimum ELFEXT pair-to-pair @40KHz |
dB |
52 |
52 |
Minimum ELFEXT pair-to-pair @60KHz |
dB |
50 |
50 |
Minimum ELFEXT pair-to-pair @80KHz |
dB |
49 |
49 |
Minimum ELFEXT pair-to-pair @100KHz |
dB |
48 |
48 |
Minimum NEXT pair-to-pair @20KHz |
dB |
61 |
61 |
Minimum NEXT pair-to-pair @40KHz |
dB |
57 |
57 |
Minimum NEXT pair-to-pair @60KHz |
dB |
55 |
55 |
Minimum NEXT pair-to-pair @80KHz |
dB |
54 |
54 |
Minimum NEXT pair-to-pair @100KHz |
dB |
51 |
51 |
Dielectric Strength Conductor to Conductor 3secs |
V DC |
3600 |
3600 |
Nominal Insulation Thickness |
mm |
0.2 |
0.25 |
Nominal Insulated Conductor Diameter |
mm |
0.9 |
1.1 |
Mechanical and Thermal Properties
Temperature range during operation (fixed state): -30°C – +70°C
Temperature range during installation (mobile state): -20°C – +50°C
Minimum bending radius: 15 x Overall Diameter
Colour Code
Standard colour code is per BT CW 110J given in Colour Code Chart.
Dimensions And Weight
Cable Code |
Number of Pairs |
Nominal Sheath Thickness |
Nominal Overall Diameter |
Nominal Weight kg/km |
| 0.5mm Conductor, 0.9mm Insulated Wire | ||||
| TP58-2Y(St)Y2P05-ISDN-B | 2 | 0.8 | 4.5 | 23.0 |
| TP58-2Y(St)Y4P05-ISDN-B | 4 | 0.8 | 5.0 | 33.5 |
| 0.6mm Conductor, 1.1mm Insulated Wire | ||||
| TP58-2Y(St)Y2P06-ISDN-B | 2 | 1.0 | 5.5 | 30.0 |
| TP58-2Y(St)Y4P06-ISDN-B | 4 | 1.0 | 6.0 | 45.0 |
