Verilink AS420 (34-00294) Product Manual - Manual (Page 23)

T e s t i n g 15
Network
Setting the front panel rocker switch to NET activates a payload loopback
where every frame of the E1 datastream received is looped back to the
network. The equipment receives unframed 1’s.
Deactivate the loopback one of three ways: setting the rocker switch to the
middle position, allowing the 72-hour timer to expire, or receiving a
loopdown code from the network.
Figure 3.2 Payload Loopback
Equipment
Setting the front panel rocker switch to EQ activates an equipment loopback
where every frame received of the E1 datastream is looped back to the device.
The network receives all 1’s.
Deactivate the loopback one of three ways: setting the rocker switch to the
middle position, allowing the 72-hour timer to expire, or receiving a
loopdown code from the network.
Figure 3.3 Equipment Loopback
Equipment Network
AS420
AIS
Equipment AS420 Network
AIS