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Wiring your Location for ISDN

Inside Wiring

By regulation, Telco service ends at what is called the demarcation point ("demarc") usually just outside your residence or in an apartment building telco equipment room. You are responsible for the wiring from the demarcation point to your ISDN equipment including the wall jacks. You will want your ISDN phone jacks close to your ISDN equipment for the best performance. You can choose to have Telco install and maintain this "inside wiring" for an additional charge, or do it yourself.

While some homes and offices may need to be re-wired for ISDN, most will not. The copper twisted pair wiring that currently provides standard analog phone service can be successfully used for ISDN. However, with the increasingly popularity of multiple lines you may not have spare wiring available for your ISDN service. Therefore, additional wiring may be necessary.

ISDN Phone Jacks

There are sevarel types of jacks associated with ISDN. It is important to check your equipment documentation to verify which jacks you need and then order the correct jack. Most terminal adapters come with the necessary cabling to plug into regular RJ11 phone jacks.

• RJ11
  This is the standard analog phone jack, and is used to deliver 2-wire service. The phone company will often install this jack for ISDN unless otherwise requested. However, some NT1s required the wider RJ45 jack. The 3Com Impact phone cable has an RJ11 plug on one end to connect to a RJ11 wall jack.

   

• RJ45
  This jack is slightly wider than the RJ11, and has 8 pins but can still be used to deliver 2-wire service such as ISDN. Again, some NT1s require this jack and their associated connecting cable with the RJ45 plug will not fit into an RJ11 jack. The Ascend Pipeline Products use a RJ45 plug on one end to connect to a RJ45 wall jack.

   

For pricing for ISDN Internet Service from ECTISP Please goto ISDN Service Types