Telephone Cables

 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

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