Ciao a tutti,
volevo solo segnalarvi che da pochi giorni ho cambiato router, passando dal mio vecchio e caro Tp-Link TD-W8970 con openwrt (col quale ero castrato al profilo 17a) ad uno Zyxel VMG8825-B50B (col quale ho finalmente profilo 35b).
Vi posto di seguito le differenze nei parametri di connessione.
Codice:
TD-W8970
Line State:UP [0x0]
Line Mode:G.993.2 (VDSL2)
Line Uptime:19h 37m 47s
Annex:B
Profile:17a
Data Rate:91.146 Mb/s / 21.382 Mb/s
Max. Attainable Data Rate (ATTNDR):92.069 Mb/s / 34.631 Mb/s
Latency:0.15 ms / 0.0 ms
Line Attenuation (LATN):13.9 dB / 17.0 dB
Signal Attenuation (SATN):13.9 dB / 17.0 dB
Noise Margin (SNR):6.0 dB / 11.7 dB
Aggregate Transmit Power(ACTATP):-12.3 dB / 14.1 dB
Forward Error Correction Seconds (FECS):0 / 0
Errored seconds (ES):0 / 1
Severely Errored Seconds (SES):0 / 0
Loss of Signal Seconds (LOSS):0 / 0
Unavailable Seconds (UAS):55 / 55
Header Error Code Errors (HEC):0 / 0
Non Pre-emtive CRC errors (CRC_P):0 / 0
Pre-emtive CRC errors (CRCP_P):0 / 0
ATU-C System Vendor ID:Broadcom 192.20
Power Management Mode:L0 - Synchronized
Codice:
ZYXEL VMG8825-B50B
============================================================================
VDSL Training Status: Showtime
Mode: VDSL2 Annex B
VDSL Profile: Profile BrcmPriv1
Traffic Type: PTM Mode
Link Uptime: 0 day: 16 hours: 49 minutes
============================================================================
VDSL Port Details Upstream Downstream
Line Rate: 21.599 Mbps 157.106 Mbps
Actual Net Data Rate: 21.600 Mbps 157.107 Mbps
Trellis Coding: ON ON
SNR Margin: 13.4 dB 6.0 dB
Actual Delay: 0 ms 0 ms
Transmit Power: -11.7 dBm 14.4 dBm
Receive Power: -24.3 dBm 0.8 dBm
Actual INP: 61.0 symbols 62.0 symbols
Total Attenuation: 12.4 dB 15.2 dB
Attainable Net Data Rate: 37.412 Mbps 160.678 Mbps
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 2.6 15.8 23.8 26.8 9.1 21.0 38.9
Signal Attenuation(dB): 2.6 15.1 22.7 26.4 9.1 20.9 37.9
SNR Margin(dB): 13.7 13.4 13.4 13.4 6.1 6.1 6.0
Transmit Power(dBm):-23.7 -14.2 -16.8 -24.1 8.0 7.1 12.1
============================================================================
VDSL Counters
Downstream Upstream
Since Link time = 49 min 15 sec
FEC: 799 88
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: 0
HostInitRetr: 0
FailedRetr: 0
Latest 15 minutes time = 4 min 57 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: 0
HostInitRetr: 0
FailedRetr: 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 12
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: N/A
HostInitRetr: N/A
FailedRetr: N/A
Latest 1 day time = 16 hours 49 min 57 sec
FEC: 799 88
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 40 40
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: 0
HostInitRetr: 0
FailedRetr: 0
Previous 1 day time = 0 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: 0
HostInitRetr: 0
FailedRetr: 0
Total time = 16 hours 49 min 57 sec
FEC: 799 88
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 40 40
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: 0
HostInitRetr: 0
FailedRetr: 0
============================================================================
Fisicamente sono a circa 334 metri dalla centrale, per cui dovrei essere limitato a 80,43 Mb/s mentre, come avete potuto vedere, con lo Zyxel raggiungo velocità in download praticamente doppie.
Codice:
Distanza dall'armadio o dalla centrale (metri) 334
Vlan disponibile TBO
Max velocità downstream (Mb/s)80,43
Max velocità upstream (Mb/s)20,16
Non so come spiegarmi questa cosa, però ritenevo importante mostrarvi la differenza a parità di linea, in termini di prestazioni della componente modem, tra i due router.