Specifications

VoiceFinder VoIP Gateway Configuration Guide (APOS 2.0) Release Version 3.1
AddPac Technology Co., LTD
- 415 / 416-
Telnet is used to connect remote terminals. Telnet allows you to log into a remote
system and to use the resources like they are connected to a local system. Telnet is
defined in RFC 854.
VCI
Stands for Virtual Channel Identifier. VCI refers to a 16-bit field in the header of an
ATM cell. VCI as well as VPI allows you to identify the next receiver of a cell while
the cell is being delivered to the receiver through a series of ATM switches. The ATM
switches use the VPI/VCI field to identify the next network VCI that the cell should
pass to reach the receiver, which is the final destination. The features of VCI are
similar to those of DLCI.
VDSL
Stands for Very-high-data-rate Digital Subscriber Line. VDSL is one of the four DSL
technologies. VDSL provides downstream of 13 Mbps to 52 Mbps and upstream of
1.5Mbps to 2.3Mbps through a pair of twisted copper wires. The operation range of
VDSL is limited to 1,000ft to 4,500ft (304.8m to 1,372m). Compare to: ADSL, HDSL,
and SDSL
VoATM
Stands for Voice Over ATM. VoATM enables a router to deliver voice traffic (e.g.
phone calling or facsimile) over an ATM network. Voice traffic is encapsulated in a
specific AAL encapsulation method for multiplexed voice when voice traffic is sent in
AT M.
VoFR
Stands for Voice Over Frame Relay. VoFR enables a router to deliver voice traffic (e.g.
phone calling or facsimile) over a frame relay network. When voice traffic is sent
through frame relay, the voice traffic is encapsulated after being decomposed into
segments by using the FRF.12 encapsulation technique to pass the frame relay
network.
VoHDLC
Stands for Voice over HDLC. Voice over HDLC enables a router to deliver live voice
traffic (e.g. phone calling and facsimile) to another router through a serial line.
VoIP
Stands for Voice over IP. VoIP is a capability that enables normal telephony voice of
the same features, reliability, and voice quality as POTS to deliver over the IP-based
Internet. VoIP enables a router to deliver voice traffic (e.g. phone calling and
facsimile) over an IP network. Over VoIP, DSP decomposes voice signals into frames,
and a pair of the decomposed frames is grouped. Then, the grouped frames are saved
in a voice packet. The voice packet is forwarded by using an IP under the ITU-T
standard, H.323.
VPN
Stands for Virtual Private Network. VPN allows you to encrypt entire traffic that
moves from a network to another network so that IP traffic can safely move over a