Hardware Specifications
| Vendor/Brand | Adtran |
| Model | SDX 621 |
| Part Number | 1287830F1 (US), F2 (UK), F3 (EU), F4 (AU) |
| Chipset | |
| Flash | |
| RAM | |
| System | Mosaic OS |
| 10GBaseT | Yes (1x 100M/1G/2.5G/5G/10G) |
| Optics | SC/APC |
| IP address | |
| Web Gui | |
| SSH | |
| Telnet | |
| Serial | |
| Serial baud | |
| Serial encoding | |
| Form Factor | ONT |
The SDX 621 is the 10GbE XGS-PON single family unit (SFU) ONT of the Adtran SDX 620 series. The 1GbE variant is the SDX 621i, the variant with one POTS port is the 621-V (1287837Fx). The SDX 621X is the version with a pluggable SFP+ WAN port. It is succeeded by the SDX 631 of the SDX 630 series.
Specifications
From the ADTRAN 621/621-V datasheet (2019):
| PON | XGS-PON (ITU-T G.9807), BOSA on board, Class B+ and Class G optics, DBA |
| Ethernet | 1x RJ-45 100M/1/2.5/5/10GBase-T, 10 Gbps symmetric throughput, auto negotiation, MDI/MDIX |
| Ethernet services | 802.1D bridging, 802.1x, 8 queues (SP/WFQ), VLAN 0-4095, Q-in-Q, VLAN translation, 9k jumbo frames |
| Video | Mediaroom and Minerva bridged video models, IGMP v2/v3 snooping |
| Management | OMCI (ITU-T G.988 and Open OMCI), Mosaic Activate, 15 min rolling counters, dying gasp |
| LEDs | Power, LAN, Optical, Voice |
| Operating temperature | 0 °C ~ +40 °C |
| Relative humidity | 5% ~ 95%, non-condensing |