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Telephone Cables |  |
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PE Insulated ISDN Primary Access Air Core Cables
Application
The cables are designed for digital communications where 120Ω impedance are required during copper
interconnection. They are used as primary access for ISDN services inside buildings between network
termination equipment and subscriber termination equipment (G703 E1/T1 systems 2.048 or 1.544 Mbps).
Standards
ER.f5.101
Construction
Conductors
Solid annealed bare copper sized 0.4/0.5mm as per ASTM B-3/class 1 of IEC 60228
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
Screen
Aluminium/Polyester tape is applied longitudinally with an overlap
Sheath
PVC or LSZH compound
Ripcord
Nylon ripcord may be placed parallel to the cores to facilitate sheath removal
Armour (optional)
Corrugated steel tape armour
Additional Outer Sheath
PVC (for NYY Cables); PE (for Armoured Cables); LSZH
Drain Wire
Solid tinned copper 0.5mm drain wire may be laid longitudinally under the screen
Electrical Properties
| Conductor Diameter | mm | 0.4 | 0.5 |
| Conductor Gauge Size | AWG | 26 | 24 |
| Conductor Size | mm2 | 0.126 | 0.196 |
| Maximum Conductor Resistance @20°C | Ω/km | 143 | 91 |
| Minimum Insulation Resistance @500V DC | MΩ.km | 10000 | 8000 |
| Maximum Resistance Unbalance | % | 2 | 2 |
| Maximum Average Mutual Capacitance @1000Hz | nF/km | 46 | 46 |
| Maximum Capacitance Unbalance @1KHz pair-to-pair | pF/500m | 45 | 45 |
| Impedance @200KHz | Ω | 120 +/- 24 | 120 +/- 24 |
| Impedance @1000KHz | Ω | 120 +/- 12 | 120 +/- 12 |
| Maximum Average Attenuation @51KHz | dB/km | 8.9 | 6.5 |
| Maximum Average Attenuation @128KHz | dB/km | 9.86 | 7.2 |
| Maximum Average Attenuation @256KHz | dB/km | 12.6 | 9.5 |
| Maximum Average Attenuation @512KHz | dB/km | 15.6 | 12.5 |
| Maximum Average Attenuation @768KHz | dB/km | 19.5 | 15.5 |
| Maximum Average Attenuation @1024KHz | dB/km | 24.6 | 19.0 |
| Maximum Average Attenuation @1280KHz | dB/km | 27 | 21 |
| Maximum Average Attenuation @1536KHz | dB/km | 27.8 | 22.2 |
| Maximum Average Attenuation @1792KHz | dB/km | 30 | 24 |
| Maximum Average Attenuation @2048KHz | dB/km | 32.8 | 26.3 |
| Minimum NEXT pair-to-pair @1000KHz | dB | 62 | 62 |
| Dielectric Strength Conductor to Conductor 3secs | V DC | 500 | 500 |
| Nominal Insulation Thickness | mm | 0.3 | 0.35 |
| Nominal Insulated Conductor Diameter | mm | 1.0 | 1.2 |
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: 10 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 |
| 120Ω Twinaxial cable | ||||
| 0.4mm Conductor, 1.0mm Insulated Wire | ||||
| TX101-2Y(St)Y1P04-ISDN-P | 1 | 0.3 | 3.0 | 10.5 |
| 0.5mm Conductor, 1.5mm Insulated Wire | ||||
| TX101-2Y(St)Y1P05-ISDN-P | 1 | 0.7 | 4.5 | 18.0 |
| Multipair 120Ω cable | ||||
| 0.5mm Conductor, 1.2mm Insulated Wire, PVC Sheathed Indoor Cable | ||||
| TP101-2Y(St)Y2P05-ISDN-P | 2 | 1.0 | 7.0 | 31 |
| TP101-2Y(St)Y4P05-ISDN-P | 4 | 1.0 | 8.2 | 57 |
| TP101-2Y(St)Y8P05-ISDN-P | 8 | 1.0 | 10.0 | 86 |
| TP101-2Y(St)Y12P05-ISDN-P | 12 | 1.0 | 10.5 | 113 |
| TP101-2Y(St)Y16P05-ISDN-P | 16 | 1.0 | 11.8 | 142 |
| TP101-2Y(St)Y18P05-ISDN-P | 18 | 1.0 | 12.5 | 152 |
| TP101-2Y(St)Y20P05-ISDN-P | 20 | 1.0 | 13.2 | 157 |
| TP101-2Y(St)Y24P05-ISDN-P | 24 | 1.0 | 13.5 | 191 |
| TP101-2Y(St)Y28P05-ISDN-P | 28 | 1.0 | 14.0 | 219 |
| TP101-2Y(St)Y32P05-ISDN-P | 32 | 1.0 | 16.5 | 260 |
| TP101-2Y(St)Y50P05-ISDN-P | 50 | 1.2 | 19.2 | 370 |
| TP101-2Y(St)Y75P05-ISDN-P | 75 | 1.2 | 23.2 | 530 |
| TP101-2Y(St)Y100P05-ISDN-P | 100 | 1.2 | 26.5 | 720 |
| 0.4mm Conductor, 1.0mm Insulated Wire, PVC Sheathed Indoor Cable | ||||
| TP101-2Y(St)Y4P04-ISDN-P | 4 | 0.7 | 6.4 | 38 |
| 0.5mm Conductor, 1.2mm Insulated Wire, LSZH Sheathed Indoor Cable | ||||
| TP101-2Y(St)H8P05-ISDN-P | 8 | 1.0 | 10.0 | 87 |
| TP101-2Y(St)H16P05-ISDN-P | 16 | 1.0 | 12.0 | 132 |
| TP101-2Y(St)H32P05-ISDN-P | 32 | 1.0 | 16.0 | 260 |
| 0.5mm Conductor, 1.2mm Insulated Wire, PVC Double Sheathed (NYY) Outdoor Cable | ||||
| TP101-2Y(St)YY4P05-ISDN-P | 4 | 1.0+1.2 | 10.0 | 105 |
| TP101-2Y(St)YY8P05-ISDN-P | 8 | 1.0+1.2 | 11.6 | 145 |
| TP101-2Y(St)YY16P05-ISDN-P | 16 | 1.0+0.6 | 13.0 | 170 |
| TP101-2Y(St)YY32P05-ISDN-P | 32 | 1.0+1.3 | 18.5 | 325 |
| 0.5mm Conductor, 1.2mm Insulated Wire, PVC Inner Sheathed, Corrugated Steel Armour, PE Sheathed, Outdoor Cable | ||||
| TP101-2Y(St)Y(STA)2Y16P05-ISDN-P | 16 | 1.0+1.2 | 17.0 | 310 |