CTC Store CTS Union IP DSLAM for ADSL IPDSLAM-A8/A16 User Manual
Page 137

 
 
XI
 
 
in RFC 791.
 
ISP 
Internet Service Provider. A company that offers individual customers or 
corporations dialup or leased-line connections to the Internet for a fee. 
 
LAN (Local Area Network) 
A non-public data network in which serial transmission is used without store and 
forward techniques for direct data communication among data stations located on 
the user's premises. 
 
Lofs (Loss of Frames) 
Lofs is a generic term with various meanings depending on the signal standards 
domain in which it’s being used. 
 
Lols (Loss of Links) 
Lols is a generic term with various meanings depending on the signal standards 
domain in which it’s being used. 
 
Loss (Loss of Signals) 
A loss of signal occurs when n consecutive zeros is detected on an incoming 
signal. 
 
Lprs (Loss of Power failures) 
Lprs is a generic term with various meanings depending on the signal standards 
domain in which it’s being used. 
 
MDF (Main Distribution Frame) 
Hardware component in the CO, which provides an interface between outside 
lines (subscriber lines and trunks) and the switching equipment. The vertical side 
of the mainframe where the outside plant cables are terminated on 
connectors/protectors. Also known as mainframe. 
 
MTU/MHU 
MTU is Multi-Tenant Unit whereas MHU is Multi-Hotel Unit.
NTP (Network Time Protocol)
NTP is an Internet standard protocol (built on top of TCP/IP) that assures accurate
