Nortel Networks BCM1000 Restriction filter, Read Only Memory ROM, Router, Routing, Serial port

Glossary 267

Restriction filter

Restriction filters prevent selected telephone numbers or feature codes from being dialed. Restriction filters can be applied to lines, sets, specific lines on a set, and to Class of Service passwords.

Read Only Memory (ROM)

Memory that stores data permanently. ROM contains instructions that the Business Communications Manager needs to operate. The instructions stored in ROM are used by the Business Communications Manager each time it is turned on or restarted.

Router

A device that forwards traffic between networks, based on network layer information and routing tables. A router decides which path network traffic follows using routing protocols to gain information about the network and algorithms to choose the best route based on a routing matrix.

Routing

The path a message takes from its origin to its destination on a network or the Internet.

Serial port

A port that sends and receives data one bit at a time.

Software keycode

Refer to Keycode.

static IP address

A static or fixed IP address that is permanently assigned to a computer.

Station Auxiliary Power Supply (SAPS)

A device which provides power to a telephone that is more than 300 m (975 ft.) and less than 1200 m (3900 ft.) from the server, or to a CAP module.

Station media bay module

Physical units installed in a Business Communications Manager that connect the telephone lines to the system.

subnet mask

A value used to route packets on TCP/IP networks. When the IP layer has to deliver a packet through an interface, it uses the destination address contained in the packet, together with the subnet mask of the interface to select an interface, and the next hop in that subnet

synchronous

A synchronous signal is sourced from the same timing reference. A synchronous signal causes the interval between successive bits, characters, or events to remain constant or locked in to a specific clock frequency.

Installation and Maintenance Guide