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Telephone Cables |  |
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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 AverageAttenuation @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 ELFEXTpair-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 NEXTpair-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 mm |
Nominal Overall Diameter mm |
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 |