Cisco MGX MGX 8800 Hardware Installation Manual page 626

Glossary
V
An ITU-T modem protocol for 300 bits per second two-wire full-duplex communications using
V.21
Frequency Shift Keying modulation. All modern modems support both V.21 and the close variant, Bell
103.
The ITU-T standard for data transmission at 48 kbs over 60 - 108 KHz group band circuits. It contains
V.35
the 34-pin V.34 connector specifications normally implemented on a modular RJ-45 connector.
Voice interworking service module -- Premium
VISM-PR
Voice over Internet protocol
VOIP
Virtual private network
VPN
Virtual source/virtual destination
VSVD
Voice switch service module
VXSM
W
Wide area network
WAN
X
Express Forwarding (as in RPM-XF)
XF
Switch module. The switch fabric card used in MGX 8950.
XM
Cisco MGX 8800/8900 Series Hardware Installation Guide
GL-6
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006