Nortel 1001t Installation Manual page 112

Glossary-18
R
Standard 1.0
private branch exchange
A telephone switch, typically used by a business to service its
internal telephone needs. A PBX usually offers more advanced
features than are generally available on the public network. A
PBX interfaces with the public network central office using
circuits known as trunks.
protocol
An agreed-upon format for transmitting data between two
devices. The protocol determines the type of error checking to
be used, the data compression method (if any), how the sending
device will indicate that it has finished sending a message, and
how the receiving device will indicate that it has received a
message.
RAM
See random access memory.
random access memory
The most common type of memory found in computers and
other devices, such as printers. The term RAM is usually
synonymous with main memory, the memory available to
programs. For example, a computer with 8M RAM has
approximately 8 million bytes of memory that programs can
use.
read-only memory
Computer memory on which data has been prerecorded and
cannot be removed.
ROM
See read-only memory.
Nortel Symposium Call Center Server
1001t Hardware Installation Guide
May 1998