06-02-2016 01:31 PM - edited 03-05-2019 04:08 AM
We have been experiencing poor performance on our DSL line intermittently. The line terminates directly to the Cisco 1801. The telco has already said that they are not seeing any issues. Could the attenuation be a contributing factor here?
Here is the output from the DSL interface
ATM0
Alcatel 20190 chipset information
ATU-R (DS) ATU-C (US)
Modem Status: Showtime (DMTDSL_SHOWTIME)
DSL Mode: ITU G.992.1 (G.DMT) Annex A
ITU STD NUM: 0x03 0x2
Vendor ID: 'STMI' 'BDCM'
Vendor Specific: 0x0000 0xA3F3
Vendor Country: 0x0F 0xB5
Chip ID: C196 (0)
DFE BOM: DFE3.0 Annex A (1)
Capacity Used: 82% 58%
Noise Margin: 9.0 dB 17.0 dB
Output Power: 17.0 dBm 12.5 dBm
Attenuation: 56.5 dB 31.5 dB
Defect Status: None None
Last Fail Code: None
Watchdog Counter: 0x19
Watchdog Resets: 0
Selftest Result: 0x00
Subfunction: 0x00
Interrupts: 8795 (0 spurious)
PHY Access Err: 0
Activations: 71
LED Status: ON
LED On Time: 100
LED Off Time: 100
Init FW: init_AMR_6.0.010.bin
Operation FW: AMR-E-6.0.010.bin
FW Source: external
FW Version: 6.0.10
Interleave Fast Interleave Fast
Speed (kbps): 3456 0 512 0
Cells: 354402 0 2401658 0
Reed-Solomon EC: 0 0 0 0
CRC Errors: 186 0 1 0
Header Errors: 72 0 0 0
Total BER: 1828E-9 0E-0
Leakage Average BER: 1828E-9 0E-0
ATU-R (DS) ATU-C (US)
Bitswap: enabled enabled
Bitswap success: 0 0
Bitswap failure: 0 0
LOM Monitoring : Disabled
The interface
ATM0 is up, line protocol is up
Hardware is MPC ATMSAR (with Alcatel ADSL Module)
MTU 4470 bytes, sub MTU 4470, BW 512 Kbit/sec, DLY 720 usec,
reliability 255/255, txload 4/255, rxload 32/255
Encapsulation ATM, loopback not set
Encapsulation(s): AAL5 AAL2, PVC mode
23 maximum active VCs, 1024 VCs per VP, 1 current VCCs
VC Auto Creation Disabled.
VC idle disconnect time: 300 seconds
Last input 3d09h, output 00:00:00, output hang never
Last clearing of "show interface" counters 2d07h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 7145
Queueing strategy: Per VC Queueing
5 minute input rate 65000 bits/sec, 5 packets/sec
5 minute output rate 9000 bits/sec, 6 packets/sec
5889777 packets input, 3449471688 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 347 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
5537888 packets output, 1332139013 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
06-02-2016 02:09 PM
Attenuation: 56.5 dB
Downstream attenuation is pretty high. I'm pretty sure ISP don't want this fact reported to them as this confirms there is a line fault.
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