Mitel 5320 Reference Manual page 126

T1
A standard North American physical wiring interface which provides twenty four 64
kilobit/second channels for telephone calls.
TCP
Transmission Control Protocol. This is a layer added onto the IP protocol (shown as
TCP/IP) to provide reliable communication.
Telco
Telephone Company. This is a company that purchases the networkWCS Hosted PBX
solution and sells voice over IP telephone service to tenants
Tenant
a customer of the service provider
Tenant Administrator
a user id that has the access rights required to perform administrative functions for a
given tenant.
TFTP
Trivial File Transfer Protocol. This is the protocol used by the networkWCS Hosted
PBX TFTP Server that sends the software load files to IP phones.
UBR
Unspecified Bit Rate. This is a characteristic of a PVC in an ATM connection. In the
networkWCS Hosted PBX system, it would be used for PC data traffic.
UDP
User Datagram Protocol. This is a layer added onto the IP protocol (shown as UDP/IP)
to provide a simple way to deliver information.
User
an individual with access to the web interface of the networkWCS Hosted PBX product.
A user has an associated user id and password/PIN number. From the perspective of a
tenant, a user also has an associated telephone extension
VBR rt
Variable Bit Rate Real Time. This is a characteristic of a PVC in an ATM connection. In
the networkWCS Hosted PBX system, it would be used for telephony traffic
VCI
Virtual Circuit Identifier. This is part of the definition of a PVC in an ATM connection. A
PVC is uniquely identified by its VCI and VPI (usually written in the form ccc.ppp where
ccc is the VCI and ppp is the VPI).
VPI
120 Glossary of Terms