NBN VDSL2 Connection Update

In Nov 2021, NBN Co announced that starting end of March 2022, they will implement 2 new functions to VDSL2 lines (FTTN and FTTB) on the NBN network, Save Our Showtime (SOS) and Robust Overhead Channel (ROC). These functions are designed to improve the stability of a VDSL2 line by preventing dropouts due to sudden large noise bursts, ensuring reliable connections to the Internet. For CPEs not supporting these new functions, another function, Seamless Rate Adaptation (SRA) will be required to ensure connectivity under certain noisy conditions. Draytek legacy routers/Modems already support dynamic SRA. The new firmware released for them will do the switch automatically when the SOS-ROC feature will be released.

For current DrayTek VDSL2 router models, such as the Vigor2765 and Vigor2865 series do support the new NBN’s SOS/ROC functions. While current firmware support the bidirectional dynamic SRA function (which should be sufficient) but if you want the SOS-ROC feature then you will need to execute a telnet command to upgrade to the SOS/ROC function.

The telnet command to enable SOS/ROC is:

vdsl optn sra bi 4

Sys reboot                        ( rem:   to save settings )

A new firmware that enables the SOS/ROC function is available now on our download page – 2765- V4.4.2  and 2865 –  V4.4.0 MDM4

The Vigor2862 and Vigor2762 series routers do not support SOS/ROC functions. However, the latest firmware fully supports bidirectional dynamic SRA. This function is sufficient for the router to maintain a reliable connection to the Internet on an SOS/ROC enabled VDSL2 line.

You will need to upgrade these routers to the new firmware as it becomes available to ensure a reliable connection to the Internet using an SOS/ROC enabled VDSL2 line.

New firmware for the Vigor2760 and Vigor130-132 is now available for download. This firmware supports bi-directional dynamic SRA allowing the router to have a stable connection on an SOS/ROC enabled VDSL line.

Vigor130

Vigor130_v3.8.5.1_modem_11.zip

Annex A Model: VDSL2 57c817, ADSL 575a11. Suitable for SOS-ROC VDSL lines of NBN

https://www.draytek.com.au/support/downloads/vigor130/

Vigor132

VigorNIC_132_v3.8.4.1_modem11.7z

Annex A modem code VDSL2 579f17, Suitable for SOS-ROC VDSL lines of NBN

https://www.i-lan.net.au/downloads/VigorNIC132F/Firmware/V3.8.4.1/VigorNIC_132_v3.8.4.1_modem_11.7z

Vigor167

This modem is SOS-ROC enabled. Use the latest firmware

Vigor2760

Vigor2760_v3.8.9.5_VECTOR5.zip

Annex A Model -57c817_575a11 -SOS-ROC compatible

https://www.draytek.com.au/support/downloads/vigor2760-delight-series/

Vigor2620L / Vigor2860

New firmware for the Vigor2620L series and Vigor2860 series routers are now available on our website. Please upgrade to the new firmware to ensure reliable connections to the Internet using an SOS/ROC enabled VDSL2 line.