User Manual

AS4000 Wireless Local Loop
System Overview
GSI 001
605-0000-430
Issue 1.2 Date 7/4/99
Page 7 of 16
The Subscriber Terminal acts as an NT1 network termination to connect the terminal
equipment into the ISDN Network.
Reference points define logical interfaces between functional groupings such as TAs and
NT1s. The S (the reference point is between user terminals and the AS4000 Subscriber
Terminal), and V (the reference point between the AS4000 CT and the line-termination
equipment in the carrier network).
“S”“T”“V”
“R”
TE1
TE2
TA
NT1
Host Network Customer PremisesAirspan Access Network
Figure 5. ISDN Reference Points
7 Central Terminal (CT)
The AS4000 CT consists of both an equipment rack and an antenna and feeder system. This
equipment is normally located at the Radio Site with transmission backhaul to the Central
Office premises. (see Figure 6).