Telephone Cables
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Ordering Information

 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

Telephone Cables

Telephone Cables

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 120 +/- 24 120 +/- 24
Impedance @1000KHz 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