Telephone Extension Cables

Telephone extension cable is a flexible extension lead used to communicate data from a phone or modem to a BT plug. Their extension length allows them to extend the capabilities of the current cable. Copper wires within the extension cable are used to transmit low voltage, high frequency electrical loads across long distances.

Fibre optic cables can also be considered a type of telecommunications cable and are at the cutting edge of communications as they have been designed to handle very high bandwidths.

What are telephone extension cables used for?

Telephone extension cables are used as a way of achieving long-distance communication. This includes telephones, television and computer communications.

Telephone extension cables differ mostly because of their cable connections. BT telephone sockets were introduced into people’s homes so they could have access to a telephone and broadband. There are two types of BT plug connectors, 431A which is 4-way and 631A which is 6-way.

The connector on the telephone is not standard but is typically a RJ11, 6P4C or 6P2C modular connector. In order to use broadband a DSL filter is necessary allowing low frequency noise to not be affected by high frequency data. The RJ11 and ADSL plugs can both connect to the DSL filter by using the sockets provided.

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Description Price Connector A Connector B Length Sheath Colour Shield Type Outer Sheath Material IP Rating Series Voltage Rating
RS庫存編號 446-664
BrandRS PRO
HK$33.33
單位
Male RJ12 Male RJ12 3m Grey - PVC - - -
RS庫存編號 446-658
BrandRS PRO
HK$26.48
單位
RJ9 RJ9 3m Grey - PVC - - -
RS庫存編號 666-7555
製造零件編號520-210-002-ASSYRS
BrandEDAC
HK$39.96
個 (以毎袋:2)
單位
2 Way Male Wire to Board Free End 1m White - - - - -
RS庫存編號 182-4532
BrandRS PRO
HK$37.39
單位
Male RJ9(4/4) Male RJ9(4/4) - Cream - - - - -
RS庫存編號 303-1271
BrandRS PRO
HK$28.56
單位
Male RJ11 Male BT431A 3m White - - - - -
RS庫存編號 667-3168
BrandRS PRO
HK$38.19
單位
Male BT Female BT 5m White - - - - -
RS庫存編號 303-1287
BrandRS PRO
HK$45.28
單位
RJ11 RJ11 3m White - - - - -
RS庫存編號 446-686
BrandRS PRO
HK$41.48
單位
Male RJ45 Male RJ45 3m Grey - PVC - - -
RS庫存編號 666-0002
製造零件編號565-003-714-900
BrandEDAC
HK$88.50
單位
3 Way Male Wire to Wire - 1m Black - - - - -
RS庫存編號 371-8495
製造零件編號F-300-1P
BrandNEUTRAL
HK$10.60
/個 (每包:5個)
單位
- - - - - - - - -
RS庫存編號 182-4560
BrandRS PRO
HK$23.75
單位
Male RJ9(4/4) Male RJ9(4/4) 5m White - - - - -
RS庫存編號 334-5918
製造零件編號SPE164912
HK$83.60
單位
Male RJ11 - 3m Black - - - - -
RS庫存編號 253-0058
製造零件編號CT1376401I
HK$74.37
單位
- - - - - - - - -
RS庫存編號 666-0018
製造零件編號565-005-724-900
BrandEDAC
HK$91.94
單位
5 Way Female Wire to Wire - 1m Black - - - - -
RS庫存編號 181-2578
製造零件編號VDIR542110
HK$72.98
單位
- - 48mm - - - IP54 Zelio Count 40 V dc
RS庫存編號 666-7564
製造零件編號520-210-003-ASSYRS
BrandEDAC
HK$51.48
個 (以毎袋:2)
單位
3 Way Male Wire to Board Free End 1m White - - - - -
RS庫存編號 168-5309
製造零件編號CORDON DESC. FIN 5M
BrandCafca
HK$363.40
單位
Male D-Sub Female D-Sub 5m Silver - - - - -
RS庫存編號 409-1280
製造零件編號SPE190853
BrandLegris
HK$229.50
單位
Male BCS Male BCS 2m Grey Unshielded Twisted Pair (UTP) - - - -
全新
RS庫存編號 189-7778
製造零件編號DS1402D-DR8+
HK$279.06
單位
Male RJ11 1-Wire 2.4m Black - PVC - - -
RS庫存編號 666-0009
製造零件編號565-005-714-900
BrandEDAC
HK$127.50
單位
5 Way Male Wire to Wire - 1m Black - - - - -