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1813 VoIP Gateway User’s Guide
remote digital loopback test: This test loops the remote digital receiver output back into the
transmitter input.
remote host: The computer receiving the network commands.
RFC: Request for Comments. Documents published by the Internet Engineering Task Force
pertaining to Internet protocols and policies.
RIP: Routing Information Protocol. The protocol governing the exchange of routing
information.
RJ11: A 6-position jack used with dial networks and telephone sets.
RJ45: An 8-position jack used with programmable dial networks.
router: Protocol-dependent device that connects subnets together. Routers operate at the
network layer (layer 3) of the ISO Open Systems Interconnection Reference Model.
routing table: A table that lists routing paths to enable a node to route traffic to another node in
the network.
RS-232: a low-speed, 25-position, DCE/DTE interface.
server: Hardware or software that offers a specific service, such as database management, to a
client.
SHDSL: Symmetric High Bit Rate Digital Subscriber Loop. A DSL technology that allows
symmetrical transmissions over longer distances. Defined by the G991.2 ITU standard.
SLA: Service Level Agreement. A contract between a service provider and a customer, which
guarantees a minimum level or quality of service to the customer.
SMTP: Simple Mail Transport Protocol. A protocol used to transfer e-mail between or among
servers.
SNMP agent: An application program that enables communication between a management
system and a device.
SNMP trap: A message sent to a SNMP manager to communicate information about changes
in the network, such as a device being reset.
SNMP: Simple Network Management Protocol. Protocol for open networking management.
static route: A route that is permanent rather than a route that is dynamically assigned by
another router.
STP: Shielded Twisted Pair. Telephone wire that is wrapped in a sheath to eliminate external
interference.
subnet address: The subnet portion of an IP address.
subnet mask: A number that identifies the subnet portion of a network address. so that IP
addresses can be shared on a local area network.
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