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

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