Does anyone know where to find a table that would indciate what the max acceptable DB loss would be between two 9148 switches utilizing
DS-SFP-FC8 GLW over 9 Micron cable.
It seems the SFP product data sheets do not provide this type of data.
I currently have two 9148 switches running at 8Gbps
TE link 1 is up and running at 8Gbps with 32 bb credits assigned to the port.
TE link 2 will not stay online at any speed 2-8Gbps with 32 to 64 credits assigned. I'm fairly certain this is a DB loss problem becuase the problem follows the cable path.
What I'm trying to resolve is how to determine what the max DB loss is over the link.
I understand the max distance for Dark fiber is as follows: 1310nm SMF 9.0 8.Gbps 10 km (6.2 mi)
So when I talk to folks that analyze the cables I can be eductaed on what the max DB loss is.
1310 SMF
9.0 8.500 10 km (6.2 mi)
DB loss is as follows for TE link 1
Cable ID: 09 990
OTDR End1
PASS
Date / Time: 10/02/2012 02:55:39pm
Cable Type: OS1 Singlemode
Tester: OptiFiber (9053014 V2.6.4)
Module: OFTM-5630 (9055001 V2.6.4)
Overall Length: 3706.8 ft
PASS
Overall Loss
PASS
1550 nm: 1.19 dB
PASS
ORL: < 32.32 dB
1310 nm (n=1.4660) 1550 nm (n=1.4670)
Location Loss Status Loss Status
(ft) (dB) (dB)
0.0 N/A N/A N/A N/A
73.8 N/A N/A N/A N/A
246.1 0.30 N/A 0.74 N/A
334.6 N/A N/A N/A N/A
429.4 0.05 N/A N/A N/A
496.9 0.07 N/A N/A N/A
3573.9 0.48 N/A -0.01 N/A
3706.8 N/A N/A N/A N/A
OTDR End2
PASS
Date / Time: 10/02/2012 01:51:32pm
Cable Type: OS1 Singlemode
Tester: OptiFiber (9053014 V2.6.4)
Module: OFTM-5630 (9055001 V2.6.4)
Overall Length: 3878.2 ft
PASS
Overall Loss
1310 nm: 1.24 dB
PASS
1550 nm: 0.80 dB
PASS
ORL: < 31.53 dB
WARNING:
- Negative Loss value found in test result.
1310 nm (n=1.4660) 1550 nm (n=1.4670)
Location Loss Status Loss Status
(ft) (dB) (dB)
0.0 N/A N/A N/A N/A
137.9 0.65 N/A 0.61 N/A
3464.1 -0.72 N/A N/A N/A
3612.5 N/A N/A N/A N/A
3640.2 1.00 N/A N/A N/A
3707.3 N/A N/A N/A N/A
3776.0 N/A N/A N/A N/A
3812.9 N/A N/A N/A N/A
3878.2 N/A N/A N/A N/A
Thanks,
Mike
OTDR End2
PASS
Date / Time: 10/02/2012 01:55:57pm
Cable Type: OS1 Singlemode
Tester: OptiFiber (9053014 V2.6.4)
Module: OFTM-5630 (9055001 V2.6.4)
Overall Length: 3706.4 ft
PASS
Overall Loss
1310 nm: 1.34 dB
PASS
1550 nm: 0.79 dB
PASS
ORL: < 34.25 dB
1310 nm (n=1.4660) 1550 nm (n=1.4670)
Location Loss Status Loss Status
(ft) (dB) (dB)
0.0 N/A N/A N/A N/A
138.0 0.46 N/A 0.17 N/A
303.8 N/A N/A 0.26 N/A
3464.5 0.47 N/A N/A N/A
3611.3 N/A N/A N/A N/A
3641.0 N/A N/A N/A N/A
3706.4 N/A N/A N/A N/A
______________________________________________________________________________________________________________
Notice the 3.42 db loss overall loss occurs on the failing side of the cable link.
Cable ID: 09 990
OTDR End1
PASS
Date / Time: 10/02/2012 02:57:16pm
Cable Type: OS1 Singlemode
Tester: OptiFiber (9053014 V2.6.4)
Module: OFTM-5630 (9055001 V2.6.4)
Overall Length: 3884.5 ft
PASS
Overall Loss
1310 nm: 3.42 dB
PASS
1550 nm: 0.75 dB
PASS
ORL: < 30.99 dB
1310 nm (n=1.4660) 1550 nm (n=1.4670)
Location Loss Status Loss Status
(ft) (dB) (dB)
0.0 N/A N/A N/A N/A
73.0 N/A N/A N/A N/A
142.6 N/A N/A N/A N/A
245.7 0.04 N/A N/A N/A
331.9 N/A N/A N/A N/A
419.0 1.27 N/A N/A N/A
488.9 N/A N/A N/A N/A
501.1 N/A N/A N/A N/A
586.2 0.55 N/A N/A N/A
673.0 0.47 N/A N/A N/A
766.1 0.21 N/A N/A N/A
855.4 -0.01 N/A N/A N/A
959.0 0.19 N/A N/A N/A
3573.5 N/A N/A N/A N/A
3706.8 N/A N/A N/A N/A
3794.1 N/A N/A N/A N/A
3884.5 N/A N/A N/A N/A
1310 nm: 1.18 dB
