Nortel Networks BCM1000 manual Disconnect supervision, Disk mirroring, Do Not Disturb, Domain name

Glossary 259

disconnect supervision

A feature that enables the system to detect if an external caller hangs up. Enable Disconnect Supervision under Trunk/Line data in Lines programming.

disk mirroring

The Business Communications Manager supports the RAID 1 disk mirroring protocol, which creates an exact data duplicate of the system hard disk on a second, co-located hard disk within the BCM1000. If one of the hard disks becomes inoperable, the system halts the mirroring process and boots from the unaffected hard disk. You can then schedule disk replacement during normal maintenance periods. This does not replace your BRU backup disks, which should still be run on a regular schedule and be kept off-site.

Do Not Disturb

A feature that stops calls from ringing at a telephone. Only Priority Calls ring at the telephone when this feature is set. A line button flashes when a call is received, but the set does not ring.

domain name

The domain name is used to translate Internet IP addresses into common language to allow for easier user access.

Domain Name Server (DNS)

The domain name system or server is the system that maps names of objects into IP numbers or other resource record values.

dual tone multifrequency (DTMF)

Two distinct telephone signaling tones used for dialing.

dynamic IP address

This feature is provided by an IP address server which assigns an IP address to a computer every time it logs on to the network.

Emergency 911 dialing

The ability to access a public emergency response system by dialing the digits 9-1-1.

emergency telephone

A single-line telephone that becomes active when there is no power to the Business Communications Manager. This telephone is also referred to as a 500/2500 telephone.

Ethernet

A local area network that networks computers with coaxial cable or twisted pair wiring. This protocol makes use of Carrier Sense Multiple Access/Collision Detect (CSMA/CD) LAN to allow computers, such as the Business Communications Manager to listen for pauses before they communicate.

Installation and Maintenance Guide