INTERFACE UNIT DIGITAL TELEPHONE

Brand	Owner	Address	Description
TOTAL REACH	Adtran	901 Explorer Blvd. Huntsville AL 358062807	interface unit for digital telephone line range extension;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A new key telephone system including a new key telephone and new telephone interface which use a new data transmission scheme has been developed, unlike an old key telephone system including an old telephone and old telephone interface unit which use an old data transmission scheme. The new telephone interface unit and new key telephone are compatible with both the new and old data transmission schemes. Even if, therefore, the new telephone interface unit is connected to the old key telephone, or the old telephone interface unit is connected to the new key telephone, data transmission can be performed by using the old data transmission scheme, thus maintaining compatibility.