glossary

Numerics

802.1 P

IEEE specification for the prioritization of traffic. Supported by the DPA 7630.

802.1 Q

IEEE specification for the implementation of VLANs in Layer 2 LAN switches. Supported by the DPA 7630.

A

auto registration

Process by which Cisco CallManager automatically detects and adds new IP telephony devices to its database, assigning the next available directory number designated for the device type.

C

call forwarding

Feature of telephony systems that sends incoming calls to a particular directory number to another number.

call waiting

Feature of telephony systems that notifies caller when another call is coming in during an active call.

CDP (Cisco Discovery Protocol)

Device-discovery protocol that runs on all Cisco-manufactured equipment. Using CDP, a device can advertise its existence to other devices and receive information about other devices in the network.

Cisco CallManager

Software-based call-processing component of the Cisco IP telephony solution, which extends enterprise telephony features and functions to packet telephony network devices such as IP phones, media processing devices, voice-over-IP (VoIP) gateways, and multimedia applications.

Cisco IP Phone

Phone designed to work with Cisco IP telephony systems. The DPA 7630 appears as multiple Cisco IP Phones to the Cisco CallManager system.

community strings

Passwords used by SNMP to remotely manage network devices.

D

DHCP (Dynamic Host Control Protocol)

Protocol that dynamically allocates and assigns an IP address to network devices.

directory number

Unique phone number assigned to devices in the Cisco CallManager database.

DNS server

Server that maintains a database for resolving host names and IP addresses, allowing network devices to query the DNS to specify remote computers by host names rather than IP addresses.

DPA (digital PBX adapter)

Gateway device used to integrate Cisco CallManager with other Octel and Lucent systems in an IP telephony network.

H

host name

Name that identifies network devices on the TCP/IP network, enabling you to access the device using this name rather than the IP address.

hunt group

Series of directory numbers organized to share the load in such a way that if the first line is busy, the next line is "hunted" until an available number is found.

I

integration mode

Method of using the DPA 7630 to integrate Cisco CallManager, Octel, and Lucent systems. Includes simple, hybrid, and multiple integration modes.

IP (Internet Protocol)

Messaging protocol that addresses and sends packets across the network. To communicate using IP, network devices must have an IP address, subnet, and gateway assigned to them.

IP Address

32-bit address assigned to hosts using TCP/IP. An IP address belongs to one of five classes (A, B, C, D, or E) and is written as 4 octets separated by periods (dotted decimal format). Each address consists of a network number, an optional subnetwork number, and a host number. The network and subnetwork numbers together are used for routing, while the host number is used to address an individual host within the network or subnetwork. A subnet mask is used to extract network and subnetwork information from the IP address.

M

MAC address (Media Access Control Address)

Address identified at the Media Access Control layer in the network. All network devices have unique MAC addresses.

MWI (message waiting indicator)

Method of indicating that a voice mail message was left for a particular directory number. Cisco IP Phones indicate this by lighting an LED on the handset. The DPA 7630 works with Cisco CallManager, Octel, and Lucent systems to ensure that these MWIs are set properly.

N

NTP (network time protocol)

Protocol that ensures that computer systems are set to the same time, relative to Greenwich Mean Time. The DPA 7630 supports NTP to access a designated NTP server in the network to ensure the time in the logs is properly set.

P

PBX (private branch exchange)

Call processing device used in traditional (analog or digital) telephony networks. The DPA 7630 can interact with Lucent PBX systems to enable messages between callers on them and Cisco CallManager systems to be handled properly.

pilot directory number

Primary directory number used by users to access voice mail. Different hunt groups have different pilot directory numbers.

R

RTP (Real Time Transport Protocol)

A standard for transporting real-time data, such as interactive voice and video over data networks.

S

Simple Network Management Protocol (SNMP)

Method by which network manage applications can query a device using a supported Management Information Base (MIB).

subnet mask

Used to partition the IP address into a network and a host identifier. The subnet mask is used to mask a portion of the IP address so that TCP/IP can distinguish the network ID from the host ID.

T

TFTP (Trivial File Transfer Protocol)

Protocol that allows transfer of files over the network. TFTP requires a TFTP server in your network, which can automatically be identified from the DHCP server.

V

voice mail system

Devices used to record, store, and retrieve voice messages. The DPA 7630 integrates with Cisco CallManager and the Octel voice mail system.

Voice over IP Protocol (VoIP)

Protocol that enables transfer of voice communications over a data network using the Internet Protocol.