Verilink AS420 (34-00294) Product Manual - Manual (Page 11)

G e n e r a l 3
C H A P T E R
1
C HAPTER 1
G
ENERAL
Introduction
The AS420 is an E1 Digital Loopback device (EDL). This device allows
network management centers to remotely activate an E1 signal payload
loopback to facilitate installation and troubleshooting of the E1 circuit. This
EDL device responds to proprietary codes, transmitted by remote test
equipment, which does not interfere with network maintenance elements that
belong to local postal telegraph (PTT) authorities.
Features
• Table top packaging
• 100– 240 VAC autoranging power supply
•
BNC (75 ohm) and RJ-48C (120 ohm) NET and EQUIP connectors
•
Compatible with fractional, full, or unframed E1 services
• LED status indicators
• DIP switch configurable
• Provides payload maintenance loop-back, towards network, on demand
• Provides DTE line loopback on demand
• Power bypass relays on EDL device to maintain E1 service to customer if the
EDL device loses power. Automatically terminates bypass mode when power
is restored to unit.
• SUPV port for local firmware upgrades