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Glossary
BDP
branch office
call routing
CDP
dialing plan
FXO
gatekeeper
gateway H.323
IP
IP telephones
local mode
Both Dialing Plans.
A dialing plan option that is supported on the main office only. The SRG supports CDP or UDP only. If the main office is running BDP, the SRG zone must be configured to allow either CDP or UDP, not both.
A system that is remote from the main office but provides telephony services using the main office servers. When a branch office is a survivable remote gateway, telephony services are provided by the branch office if communication with the main office is lost.
Coding that is configured on a system to ensure that outgoing calls are directed to the correct trunks and incoming calls are directed to the correct device(s) on the system. (see also: dialing plan)
Coordinated Dialing Plan.
Under the recommended Coordinated Dialing Plan, the Branch User ID can be an extension (for example, 4567). For more information about CDP, consult the main office documentation that covers dialing plans.
Each system uses a specific numbering configuration (dialing plan) that determines how calls will be handled over a private or public network. (see also: call routing)
Foreign eXchange Office: an interface that connects to the PSTN central office and is
the interface offered on a standard telephone. Example:
The gatekeeper is an IP network application that directs IP traffic to all the systems on the network. Parameters for both the main office and the SRG must be assigned to all gatekeepers on the network. If the gatekeeper is down, the SRG attempts to connect to the alternate gatekeeper, if there is one. If the alternate gatekeeper is also down, or there is no alternate gatekeeper, the SRG IP telephones remain registered with the main office, but calls cannot be sent to the SRG.
The IP portal on each system that establishes the VoIP trunk.
An IP gateway protocol used by both the main office and the SRG to create VoIP trunking connections.
Internet Protocol
IP specifies the format of packets, also called datagrams, and the addressing scheme in the TCP/IP protocol suite. Where IP defines the packet and addressing scheme, Transport Control Protocol (TCP) establishes a virtual connection between a destination and a source.
Telephones that can connect directly with a TCP/IP network. Also known as internet telephones.
The operating mode of redirected SRG IP telephones when connectivity with the main office is unavailable.
