Hi
We have conducted some OLT4.4 rate Experiments using DS280DF810.
And following is config and sequence of initialization of CDR.
Register in hex |
Value in hex |
Remarks |
Fc |
1 |
|
ff |
3 |
|
0 |
4 |
|
a |
c |
|
2f |
70 |
|
31 |
40 |
|
1e |
2 |
|
8e |
0 |
|
3d |
98 |
|
3f |
41 |
|
3e |
44 |
|
60 |
E1 |
OTL4.4 data rate;27.952 Gbps |
61 |
C5 |
|
62 |
E1 |
|
63 |
C5 |
|
64 |
ff |
|
9 |
4 |
|
18 |
0 |
|
a |
0 |
|
With above settings Traffic comes up.
But PPM jump /error is there when we read from registers 0x3b, 0x3c after manually starting PPM error count with 35-> 0x2f
Values we see in for eg :3b -> 34, 32 etc., 3c->00 ; verified couple of channels. We are getting PPM error count.
What is tolerance of this or any limit for this PPM for 27.952 Gbps data rate?
And how to reduce this PPM error count, ways to reduce?
Thanks
Suresh
Sr, Manager, R & D, POTP HW
Tejas Networks Ltd
Bangaluru