What is the ADTRAN 1442521F1?
The ADTRAN 1442521F1 is a GPON access equipment, listed by the manufacturer as "GPON 20 SM/Single 1610 TX / 1550 RX GPON 1.5 to 5.0 –28.0 to –8.0 28". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.