Verilink XEL XSP-100 SHARK IAP (9SA-USRS-9.0R1.02) Product Manual - Manual (Page 258)

Chapter 10 Chapter 10.Appendix A: Glossary
Appendix: 10-16 XEL P/N & Release: 9SA-USRS-9.0R1.02 SHARK™ IAD User's Guide
VPC Virtual path connection.
VPI Virtual path identifier.
V.35 International Telecommunications Union – Telecom Standardization (ITU-T) Recommendation
section V, number 35.
-W-
WAN Wide Area Network. A data network typically extending a LAN outside the building, over
telephone carrier lines to link to other LANs in remote buildings in possibly remote cities.
W
INK
D
ELAY
A type of trunk signaling for incoming call. This signaling allows ANI and DNIS numbers to be
used with standard loop start cards (i.e., voice mail, and fax) without the need for special
signaling converters. This is done by providing a “wink back” to the carrier after the analog line
is answered so that any digits delivered by the carrier may be received from the analog port.
W
INK
S
TART
The most common type of trunk signaling for incoming and outgoing calls. After the XSP - 100
detects the trunk going off hook on an incoming call, it transmits a 200 millisecond off-hook
pulse, then returns to the on-hook state. The originating trunk detects this “wink back,” waits at
least 210 milliseconds, sends out digits, and then rings the analog line. When the call is
answered, the XSP - 100 transmits an off-hook pulse.
WWW World Wide Web.
- X -
XON
/
XOFF
Special characters used for software flow control to regulate communication between a device
and a modem.
X
MODEM
A communications protocal with error checking and retransmittals that is used for transfer of
binary files.
- Y -
Y
ELLOW
A
LARM
A yellow alert is a T1 alarm signal sent back toward the source of a failed transmit circuit. The
alert sends zeros in bit two of all time slots. Also see RAI.
- Z -