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simonebortolin merged 2 commits into from
Oct 9, 2026
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Add the Adtran SDX 621 and SDX 621X #503

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c9a5c01
Add the Adtran SDX 621 and SDX 621X
simonebortolin Oct 9, 2026
853d01c
Link the SDX 621X from the SDX 621
simonebortolin Oct 9, 2026
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54 changes: 54 additions & 0 deletions ont-xgs/ont-adtran-sdx-621.md
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---
title: Adtran SDX 621
has_children: false
parent: Adtran
---

# 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](/xgs/ont-adtran-sdx-621i), the variant with one POTS port is the 621-V (1287837Fx). The [SDX 621X](/xgs/ont-adtran-sdx-621x) is the version with a pluggable SFP+ WAN port. It is succeeded by the [SDX 631](/xgs/ont-adtran-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 掳C ~ +40 掳C |
| Relative humidity | 5% ~ 95%, non-condensing |

# Miscellaneous Links

- [Adtran SDX 621](https://www.adtran.com/solutions/by-segment/products/by-category/fiber-access/optical-network-terminals-ont/621.html)
- [ADTRAN 621/621-V Datasheet](https://www.cticonnect.com/PDF%20Files/ADTRAN_1287830F1_datasheet.pdf)
- [ADTRAN 621/621-V Datasheet (plytix)](https://files.plytix.com/api/v1.1/file/public_files/pim/assets/ff/af/4b/62/624bafff06de6ea8aa834968/texts/b9/d2/5a/62/625ad2b92b5b5696fc385d39/AdTran-SDX621-XGSPON-ONT-1287830F1-DataSheet.pdf)
- [SDX 620 Series Datasheet](https://www.adtran.com/-/media/adtran/resources/data-sheets/pdfs/sdx-620-series.pdf)
- [SDX 621 Quick Start (ManualsLib)](https://www.manualslib.com/manual/3402279/Adtran-Sdx-621-Xgs-Pon-Ont.html)
- [WAV - Adtran SDX 621 (1287830F1)](https://www.wavonline.com/Adtran-1287830F1)
- [Netceed - Adtran SDX 621](https://us-store.netceed.com/adtran-sdx-621-ont-10ge-xgs-pon/)
2 changes: 1 addition & 1 deletion ont-xgs/ont-adtran-sdx-621i.md
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| Weight | 1.15 lbs (~520 g) |
| Dimensions | 10" x 6.25" x 2.75" (254 x 159 x 70 mm) |

The SDX 621i is the 1GbE variant of the Adtran 621 family of XGS-PON single family unit (SFU) ONTs. It supports remote activation/deactivation, remote firmware upgrades/downgrades and remote OMCI management.
The SDX 621i is the 1GbE variant of the Adtran 621 family of XGS-PON single family unit (SFU) ONTs (the 10GbE version is the [SDX 621](/xgs/ont-adtran-sdx-621)). It supports remote activation/deactivation, remote firmware upgrades/downgrades and remote OMCI management.

## List of software versions

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50 changes: 50 additions & 0 deletions ont-xgs/ont-adtran-sdx-621x.md
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---
title: Adtran SDX 621X
has_children: false
parent: Adtran
---

# Hardware Specifications

| | |
| --------------- | ------------------------------------------------ |
| Vendor/Brand | Adtran |
| Model | SDX 621X |
| Part Number | 1287823F1, 1287823F2 (UK) |
| Chipset | |
| Flash | |
| RAM | |
| System | Mosaic OS |
| 10GBaseT | Yes (1x 100M/1G/2.5G/5G/10G + 1x 10/100/1000) |
| Optics | SFP+ pluggable XGS-PON WAN port |
| IP address | |
| Web Gui | |
| SSH | |
| Telnet | |
| Serial | |
| Serial baud | |
| Serial encoding | |
| Form Factor | ONT |

The SDX 621X is a 10G XGS-PON single family unit (SFU) ONT of the Adtran SDX 600 series. Unlike the [SDX 621](/xgs/ont-adtran-sdx-621), which has the optics on board, the 621X has a pluggable SFP+ WAN port for the XGS-PON optics, two Ethernet ports (10GE and 1GE) and two POTS ports.

## Specifications

From the ADTRAN 621X datasheet:

| | |
| --------------------- | ---------------------------------------------------------------------------- |
| PON | XGS-PON (ITU-T G.9807) on SFP+ pluggable, Class B+ and Class G optics, DBA |
| Ethernet | 1x RJ-45 100M/1/2.5/5/10GBase-T, 1x RJ-45 10/100/1000Base-T, 10 Gbps symmetric |
| POTS | 2x RJ-11, 3-REN, SIP and MGCP VoIP, GR-303, GR-57 and TR-08 TDM voice |
| Ethernet services | 802.1D bridging, 802.1x, 8 queues (SP/WFQ), VLAN 0-4095, Q-in-Q, 9k jumbo frames |
| Power supply | 12 VDC (external AC/DC adapter), dying gasp, multi-pin connector for UPS power and alarms |
| Power consumption | < 20 W |
| Operating temperature | 0 掳C ~ 40 掳C |
| Relative humidity | 5% ~ 95% |
| Dimensions (L x W x H)| 6.4" x 9.75" x 1.5" (163 x 248 x 38 mm) |
| LEDs | Status, Network, Voice, Data |

# Miscellaneous Links

- [ADTRAN 621X Datasheet (Pulse Supply)](https://www.pulsesupply.com/images/pdf/adtran/621X.pdf)
2 changes: 2 additions & 0 deletions ont-xgs/ont-adtran-sdx-631.md
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Expand Up @@ -40,6 +40,8 @@ From the SDX 630 series datasheet:
| Ethernet | 9k jumbo frames, 802.1ad Q-in-Q, SyncE |
| Operating temperature | 0 掳C ~ +40 掳C |
| Dimensions (D x W x H) | 114.5 x 133.3 x 35.5 mm |
| Weight | 0.75 lbs / 0.3 kg |
| Relative humidity | up to 95%, non-condensing |
| Mounting | Desk, wall, fiber tray, wall mount box, DIN rail |

# Miscellaneous Links
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Expand Up @@ -38,6 +38,8 @@ From the SDX 630 series datasheet:
| Management | OMCI (ITU-T G.988), BBF.247, TR-471 speedtest, Y.1731 |
| Operating temperature | 0 掳C ~ +40 掳C |
| Dimensions (D x W x H) | 114.5 x 133.3 x 35.5 mm |
| Weight | 0.75 lbs / 0.3 kg |
| Relative humidity | up to 95%, non-condensing |
| Mounting | Desk, wall, fiber tray, wall mount box, DIN rail |

# Miscellaneous Links
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