AP-IP230 IP Phone Installation Guide Version 1.0
AddPac Technology Proprietary & Documentation
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system and operate the resources as working on the local system. Defined on
RFC 854.
VCI
the address or label of a VC; a value stored in a field in the ATM cell header
that identifies an individual virtual channel to which the cell belongs. VCI
values may be different for each data link hop of an ATM virtual connection.
VDSL
New DSL technology that accepts bandwidths of up to 27 Mbps over relatively
short distances. VDSL, in the process of being standardized, allows symmetric
or asymmetric throughputs that are much higher than other xDSL standards
(up to 27 Mbps when downloading and 3 Mbps when uploading under
asymmetric or 14 Mbps in symmetric), as well as the simultaneous transport of
ISDN (Numeris) services but with much shorter ranges that do not exceed 900
m to 1 km. In practice, this technique may require the deployment of optical
remotes and the setting up of active equipment in the local loop. Compare
with: ADSL, HDSL, SDSL.
VoATM
Voice Over ATM. Voice over ATM enables an ATM switch to carry voice traffic
(for example, telephone calls and faxes) over an ATM network. When sending
voice traffic over ATM, the voice traffic is encapsulated using AAL1/AAL2 ATM
packets.
VoFR
Voice Over Frame Relay. Voice over Frame Relay enables a router to carry
voice traffic (for example, telephone calls and faxes) over a Frame Relay
network. When sending voice traffic over Frame Relay, the voice traffic is
segmented and encapsulated for transit across the Frame Relay network
using FRF.12 encapsulation.
VoHDLC
Voice Over HDLC. Voice over HDLC enables a router to carry live voice traffic
(for example, telephone calls and faxes) back-to-back to a second router over
a serial line.
VoIP
VoIP (Voice delivered using the Internet Protocol) is a term used in IP
telephony for a set of facilities for managing the delivery of voice information
using the Internet Protocol (IP). In general, this means sending voice
information in digital form in discrete packets rather than in the traditional
circuit-committed protocols of the public switched telephone network (PSTN).
A major advantage of VoIP and Internet telephony is that it avoids the tolls
charged by ordinary telephone service.
VPN
Virtual Private Network, VPN allows IP traffic to travel securely over a public
TCP/IP network by encrypting all traffic from one network to another. A VPN
uses "tunneling" to encrypt all information at the IP level.
WAN
A network that covers a large geographical area. Typical WAN technologies
include point-to-point, X.25 and frame relay. Compare with: LAN, MAN.
