https://community.talktalk.co.uk/t5/Fibre/Sudden-Upstream-Collapse-After-16-Days-Stability-FTTC-Line-Fault/m-p/3149947#M405861 <P>Hi,<BR />I’ve had a stable FTTC connection since <STRONG>23 May</STRONG>, with upstream consistently around <STRONG>6.5 Mbps</STRONG> and attainable around <STRONG>10 Mbps</STRONG>. SNRM was steady at ~10 dB and the line had been up for around <STRONG>16 days</STRONG> with no issues.</P><P>Today the upstream has <STRONG>suddenly collapsed</STRONG> to:</P><UL><LI><STRONG>654 kbps sync</STRONG></LI><LI><STRONG>3255 kbps attainable</STRONG></LI><LI><STRONG>12.7 dB SNRM</STRONG></LI><LI>Errors rising</LI></UL><P>Downstream remains normal at ~28.6 Mbps with attainable ~47 Mbps.<BR />Attenuation is unchanged.<BR />No changes to internal wiring or equipment.</P><P>This is an <STRONG>upstream‑only line fault</STRONG>, not DLM and not a router/Wi‑Fi issue. The pattern matches an HR fault, water ingress, or a cabinet port problem.</P><P>Could you please raise this with Openreach for:</P><UL><LI><STRONG>PQT (Pair Quality Test)</STRONG></LI><LI><STRONG>Lift‑and‑shift</STRONG> if the port is faulty</LI><LI><STRONG>Engineer visit</STRONG> if PQT fails</LI></UL><P>The fault is active right now.<BR />Thanks.</P><P>John</P> Tue, 09 Jun 2026 15:46:35 GMT oldjohn1945 2026-06-09T15:46:35Z https://community.talktalk.co.uk/t5/Fibre/Sudden-Upstream-Collapse-After-16-Days-Stability-FTTC-Line-Fault/m-p/3149947#M405861 <P>Hi,<BR />I’ve had a stable FTTC connection since <STRONG>23 May</STRONG>, with upstream consistently around <STRONG>6.5 Mbps</STRONG> and attainable around <STRONG>10 Mbps</STRONG>. SNRM was steady at ~10 dB and the line had been up for around <STRONG>16 days</STRONG> with no issues.</P><P>Today the upstream has <STRONG>suddenly collapsed</STRONG> to:</P><UL><LI><STRONG>654 kbps sync</STRONG></LI><LI><STRONG>3255 kbps attainable</STRONG></LI><LI><STRONG>12.7 dB SNRM</STRONG></LI><LI>Errors rising</LI></UL><P>Downstream remains normal at ~28.6 Mbps with attainable ~47 Mbps.<BR />Attenuation is unchanged.<BR />No changes to internal wiring or equipment.</P><P>This is an <STRONG>upstream‑only line fault</STRONG>, not DLM and not a router/Wi‑Fi issue. The pattern matches an HR fault, water ingress, or a cabinet port problem.</P><P>Could you please raise this with Openreach for:</P><UL><LI><STRONG>PQT (Pair Quality Test)</STRONG></LI><LI><STRONG>Lift‑and‑shift</STRONG> if the port is faulty</LI><LI><STRONG>Engineer visit</STRONG> if PQT fails</LI></UL><P>The fault is active right now.<BR />Thanks.</P><P>John</P> Tue, 09 Jun 2026 15:46:35 GMT https://community.talktalk.co.uk/t5/Fibre/Sudden-Upstream-Collapse-After-16-Days-Stability-FTTC-Line-Fault/m-p/3149947#M405861 oldjohn1945 2026-06-09T15:46:35Z https://community.talktalk.co.uk/t5/Fibre/Sudden-Upstream-Collapse-After-16-Days-Stability-FTTC-Line-Fault/m-p/3149950#M405862 <P><a href="https://community.talktalk.co.uk/t5/user/viewprofilepage/user-id/700106">@oldjohn1945</a>, you need to try to reach Chat through My Account or phone 03451 720088 for technical support&nbsp; - there's no staff support on the forum any longer.&nbsp;</P> <P>&nbsp;</P> <P>Details of opening hours here:</P> <P>&nbsp;</P> <P><A href="https://help-centre.talktalk.co.uk/Billing_and_Payments/Something_else/How_to_contact_TalkTalk_Broadband" target="_blank">https://help-centre.talktalk.co.uk/Billing_and_Payments/Something_else/How_to_contact_TalkTalk_Broadband</A></P> Tue, 09 Jun 2026 16:43:31 GMT https://community.talktalk.co.uk/t5/Fibre/Sudden-Upstream-Collapse-After-16-Days-Stability-FTTC-Line-Fault/m-p/3149950#M405862 Gliwmaeden2 2026-06-09T16:43:31Z