User Manual

AS4000 Subscriber Terminal

Installation and Commissioning GSI 002

605-0000-436

Issue 1.5 Date: 18th October 1999

Page 1 of 6 1988 Airspan Communications Corporation

AS4000 SUBSCRIBER TERMINAL OVERVIEW

1. AS4000 Subscriber Terminal

1.01 The AS4000 Subscriber Terminal (ST) Equipment is installed at the end-user’s

premises, normally by the Network Operator. The ST is made up of four distinct

physical components known as:

• Customer Radio Unit (CRU), mounted outdoors wall or pole mounted

• Power Supply Unit (PSU), mounted indoors

• A Junction Box (Type 1 PSU Only)

• Network Terminating unit (NTU), normally supplied by the Network Operator

• Connectorised Drop Cable, to connect CRU and PSU

Mains Plug

CRU

PSU

NTU

Drop

Cable

Figure 1. AS4000 ST-V2 Connection (Type 2 Power Unit)

1.02 The CRU is a sealed weatherproof unit and contains the majority of the electronics,

including the antennas, radio transceiver and the line interface functions. This unit is

normally mounted externally on a wall facing in the general direction of the CT. The

CRU is connected to a junction box (PSU Type 1) or a terminal block within the

PSU (PSU Type 2 and 4) using a drop cable. The junction box/terminal block is

cabled to an NTU, into which the Customer Premise Equipment (CPE) is

connected. The CRU may also be mounted on a pole using a pole mounting bracket

and special strain bearing drop cable.

1.03 The CRU Mounting Bracket provides adjustment (in the azimuth plane) of the CRU

in an arc over 150°, the optimum positioning being determined by measuring the

strength of the incoming signal, usually in the direction of the CT antenna.