Basic Rate Interface (BRI) Feature

Description: Call Processing

An explanation of incoming and outgoing call processing follows.

BRI calls can be received on Personal Line or Pool buttons, or by Calling Groups or the QCC Queue. Incoming calls on BRI lines appear to a user just like calls on other types of lines.

The display provides call-related information about incoming BRI calls, if available. If calling party information is available and the receiving telephone is a 4400-Series, MLX, ETR, or MLS display telephone, the information is displayed on the telephone. Called party information is usually displayed on the second page of the 4412D+, 4424D+, 4424LD+, MLX, and ETR displays. (Some telephones with 2 x 16 displays, such as the 4400D and 4406D+, do not have second pages and therefore do not display called party information.)

Hyphens are inserted between the digits of the Calling Party Number for incoming calls -- for example, 555-1234 for a 7-digit telephone number and 123-555-1234 for a 10-digit telephone number. Any other number of digits appears without hyphens.

A brief description of the display support follows. Refer to Display for additional details.

BRI display support applies to 4400-Series, MLX, and ETR display telephones. The 4400D, 4406D+, and MLS telephones can display Calling Party Number information, but not Called Party Number information because these displays do not have second pages.

• Incoming BRI Calls (Non-Group Calling) - When the calling party information is available from the network, the Calling Party Number (CPN) appears on the user's display. Pressing
on the 4412D+, 4424D+, or 4424LD+ telephone or the More button on the MLX and ETR telephones shows the Called Party Number on the second page of the display. (Called Party Number does not appear on 4400D, 4406D+, or MLS telephones.)

• Group Calling - The 4400-Series, MLX, or ETR display telephone of a Calling Group member shows the original Called Party Number. Pressing
on the 4412D+, 4424D+, or 4424LD+ telephone, or the More button on the MLX and ETR telephones, shows the Calling Party Number on the second page of the display.

• Transfer without Consultation - Pressing
on the 4412D+, 4424D+, or 4424LD+ telephone, or the More button on an MLX or ETR telephone that is a transfer destination, shows the original Called Party Number. (Called Party Number does not appear on 4400D, 4406D+, or MLS telephones.)

Outgoing calls on BRI lines can be made using one of three methods:

• Personal Line - When an idle Personal Line that represents a BRI line is accessed, the system sets up a call to establish a connection to the central office. The status light turns green, and dial tone is provided by the central office. As digits are dialed, they are transmitted to and processed by the central office.
• Pool Button - Like any other type of line/trunk, a BRI line can be accessed via a Pool button, or by using an SA button and dialing a pool access code.
• Automatic Route Selection - Like any other type of line/trunk, a BRI line can be accessed by using an SA button and dialing the ARS access code. ARS processing may modify the dialed number through standard digit deletion and addition. ARS can also take advantage of the distinction between voice and data calls for routing purposes when making outbound calls over BRI lines. For example, if data is frequently sent to a particular number in another area of the country, ARS can route calls to that number over high-speed data lines.

Topics
	Description
	Terminology Clock Synchronization Clock Switching Timers and Counters Call Processing
	At a Glance
	Considerations & Constraints
	Feature Interactions