cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
796
Views
0
Helpful
2
Replies

strong DS3 signal

paul amaral
Level 4
Level 4

Hi I have a fiber mux that converts the signal into DS3 which is terminated on a cisco 6513, IOS 12.2(18)SXF14, WS-X6582-2PA module.

From the Mux to the Cisco its about 10 feet, I have no control of the mux fyi. Out of this Mux I have 3 DS3, two of them have a lot more C-bit/P-bit errors then I think should be there. On the other DS3 I have a 10 db anttenuator and im seeing some on occasion but alot less.

for example on the DS3s with no attenuator i see

Total Data (last 10 15 minute intervals):

  0 Line Code Violations, 7 P-bit Coding Violation,

  7 C-bit Coding Violation,

  5 P-bit Err Secs, 0 P-bit Sev Err Secs,

  0 Sev Err Framing Secs, 0 Unavailable Secs,

  5 Line Errored Secs, 5 C-bit Errored Secs, 0 C-bit Sev Err Secs

but the DS3 with the 10db attenutor shows no errors

Total Data (last 10 15 minute intervals):

   0 Line Code Violations, 0 P-bit Coding Violation,

   0 C-bit Coding Violation,

   0 P-bit Err Secs, 0 P-bit Sev Err Secs,

   0 Sev Err Framing Secs, 0 Unavailable Secs,

   0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs

The same is true for a 24 hour period, i might see a few errors on the circuit with the 10 db attenuator but a lot more on the circuits with no attenutor.

Is there a way on the 6500 for me to see how much input signal power the PA is taking in so I can look up if its within the cisco DS3 PA specifications?

1 Accepted Solution

Accepted Solutions

vmiller
Level 7
Level 7

Which port adapter are you using?

I think you need a meter for this one.

View solution in original post

2 Replies 2

vmiller
Level 7
Level 7

Which port adapter are you using?

I think you need a meter for this one.

paul amaral
Level 4
Level 4

Vmiller its a regular PA-2T3.

Just wanted to update that indeed the issue was related to the incoming signal to the RX PA port being too strong. After placing 10db attenuators on the PA ports all P/C-bit errors are gone.

Accidently marked Vmiller's message as the correct answer, the above statement is the actually correct answer.

paul