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All National Communications products undergo a rigorous Quality Control procedure, by skilled electronics technicians, before despatch to our customers.

Each product is individually tested for every function that it provides. As a result, our products have developed an exceptional reputation for performance and reliability.

Most operational problems with our equipment are caused by connection errors, incorrect settings or incorrect positioning of other telephone equipment on the same telephone line.

Problems following periods of successful use can be caused by lightning induced voltage surges, on your telephone line. Our Line Sharers are designed with internal circuitry that in most cases will minimize damage caused by such surges. An inexpensive surge repair service is provided.

Our equipment is completely compatible with ADSL, providing correct ADSL filtering is provided.
Our equipment is compatible with Calling LIne Identification and most other other Telecom services, providing that all equipment is connected correctly.
Our equipment is completely compatible with Dial Out Security Alarms providing that this equipment is connected correctly, ahead of all other telephone equipment on your telephone line.

A FAQ (Frequently Asked Questions) section is provided to cover most common installation and operational issues. We advise you to refer to this section first, as it may provide the information and assistance you require.

If your particular query is not addressed in our FAQ section, we have an experienced team of technicians available to assist you to identify the source of your problem and to provide you with advise on how to rectify your problem.

Because of the large number of applications that our equipment is used for, combined with your own individual site specific information, we prefer to receive your support enquiries by telephone, where via a short question and answer routine, we can quickly understand your problem and in most cases provide you with an immediate solution.

Our technical staff are available by telephone on ph 0800 530 8645, from 8:30AM to 5:00PM, Monday to Friday

If you must contact us by email, then to avoid delays, it is very important that you fully complete each section of the following support form:

In the unlikely event that you need to return your unit for repair, then it must be returned with a fully completed RMA form.

250 College Park Dr
Upland CA 91786
Ph :  800 530 8645
Email: info@natcomm.us


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