AT&T 555-600-736 manual OFF Premises Stations

-19-

OFF PREMISES STATIONS

On occasion, customers need to locate telephones away from the principal area of the PBX or Key system terminal concentration. The telephone can use an off-premises or out-of-building arrangement. There is a major difference between the two types.

An off-premises telephone (OPT) is a single-line set that is located in another building and connected to the LEGEND system via a special arrangement with the CO.

The station has the same features as an on-premises single-line station except it is counted as an outside party in a conference call. Also, the message light feature will not operate with the OPT set.

The OPT feature is sometimes used to provide service to executives at their homes. It allows them remote access to the PBX system features and services.

An out-of-building telephone, on the other hand, is connected directly to a system port even though it is not located in the same building. It may be an ATL or MLX set, single-line or multiline. Because it is direct, it has access to all system features. However, if the telephone is located less than 1000 feet from the switch, an IROB (in range, out of building) protector must be attached.

The OPT connection from a CO would be equivalent to a tie line; in effect, it is a dedicated line. Because it has the same electrical properties as a tie line, the 008 OPT module can be used to connect the LEGEND system to another LEGEND system, or another PBX or key system. The characteristics of the 008 OPT module are listed below:

It should be noted that an OPT connection to a CO requires that the LEGEND system be no further than 1 to 3 miles from the CO, depending upon the characteristics of the CO involved.

008 OPT: The Off-Premises Telephone 008 OPT Module is used to connect off-premises touch-tone telephones to the LEGEND system. The system software recognizes the 008 OPT module as a 012 module. Even- though the OPT module has 8 jacks, it uses 12 ports of capacity, thereby decreasing overall station capacity by four stations for every OPT module used.

Module	Station Type			Specifications
008 OPT	On-premises	or	off-	Capacity:	8	stations, 2
	premises	single-line		Touch-Tone		receivers
	telephone			Notice to	Telco: meets
				FCC 0L13C and :/FCC
				Class C Loop resistance:
				serves 2-wire loops to
				1300 ohms,		including
				stations Port losses: 3 db
				(both directions)
	Unit Load Rating			8.0
	max. distance supported			1-3 miles between Legend
				and CO