F5F Stay Refreshed Power Users Networks Connection becomes unexpectedly sluggish.

Connection becomes unexpectedly sluggish.

Connection becomes unexpectedly sluggish.

L
Linkiechu
Member
145
02-12-2025, 04:36 PM
#1
Recently, over the past week, my internet connection has become extremely slow. I’m using a VDSL2 connection via Century Link with a Zyxel C3000Z modem/router (not a rental; we purchased it when we moved in). The neighborhood is roughly 21 to 25 years old. I attempted a reboot of the modem/router, but nothing changed. Now I suspect either the DSL line entering my house or the modem itself may be faulty. For reference, here’s the status data from the modem/router:

- DSL Line 1: Unavailable
- Seconds since reboot: 223 (approx. startup time)
- Estimated loop length: 2670 feet
- SNR: 7.3 dB (down), 6.7 dB (up)
- Attenuation: 17.5 dB (down), 8.2 dB (up)
- Power: 17.5 dBm (down), 7.6 dBm (up)
- Near End RS FEC Corrections: 191083
- 30-minute FEC Corrections: 1328
- Far End RS FEC Corrections: 564
- 30-minute FEC Corrections: 10
- 0.25–0.5 miles away (0.402–0.804 km)

Would you consider the modem, the line inside your home, the line in the neighborhood, or somewhere outside that range as the likely source?
L
Linkiechu
02-12-2025, 04:36 PM #1

Recently, over the past week, my internet connection has become extremely slow. I’m using a VDSL2 connection via Century Link with a Zyxel C3000Z modem/router (not a rental; we purchased it when we moved in). The neighborhood is roughly 21 to 25 years old. I attempted a reboot of the modem/router, but nothing changed. Now I suspect either the DSL line entering my house or the modem itself may be faulty. For reference, here’s the status data from the modem/router:

- DSL Line 1: Unavailable
- Seconds since reboot: 223 (approx. startup time)
- Estimated loop length: 2670 feet
- SNR: 7.3 dB (down), 6.7 dB (up)
- Attenuation: 17.5 dB (down), 8.2 dB (up)
- Power: 17.5 dBm (down), 7.6 dBm (up)
- Near End RS FEC Corrections: 191083
- 30-minute FEC Corrections: 1328
- Far End RS FEC Corrections: 564
- 30-minute FEC Corrections: 10
- 0.25–0.5 miles away (0.402–0.804 km)

Would you consider the modem, the line inside your home, the line in the neighborhood, or somewhere outside that range as the likely source?

C
ctobin8
Member
195
02-12-2025, 04:36 PM
#2
The signal-to-noise ratio on line 1 appears quite low, possibly due to issues at the receiving end or problems with the cable/wiring along the circuit.
C
ctobin8
02-12-2025, 04:36 PM #2

The signal-to-noise ratio on line 1 appears quite low, possibly due to issues at the receiving end or problems with the cable/wiring along the circuit.

S
SugarCandy21
Member
196
02-12-2025, 04:36 PM
#3
Consider reaching out to your ISP if you encounter issues or need assistance with your service.
S
SugarCandy21
02-12-2025, 04:36 PM #3

Consider reaching out to your ISP if you encounter issues or need assistance with your service.

H
hunchmuffin6
Member
209
02-12-2025, 04:36 PM
#4
It seems they should possess the testing tools needed to identify the issue.
H
hunchmuffin6
02-12-2025, 04:36 PM #4

It seems they should possess the testing tools needed to identify the issue.

T
tamemarco
Senior Member
482
02-12-2025, 04:36 PM
#5
Telco specialist here. Seems one of the connections in your copper pair isn’t heating up properly. Reach out to your ISP and have them check it out. This should reveal the issue.
T
tamemarco
02-12-2025, 04:36 PM #5

Telco specialist here. Seems one of the connections in your copper pair isn’t heating up properly. Reach out to your ISP and have them check it out. This should reveal the issue.