Tunable SFP

Sun Jun 7 23:04:42 UTC 2015

Eric wrote:
>Dwdm tunable 10G can run at 1G with rate select.

+1 already tested and deployed in the field. The configuration/programming
of the tunable needs to be modified because pure 1G gear can not handle
the 10G configuration of the tunable in most cases.
For sure the mayor (economical) case for tunable SFP+ is 10G Ethernet but
beside 1G ETH it also works for 4/8G FC datarate.

Thomas

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>> On Jun 7, 2015, at 2:15 PM, Tony Wicks <tony at wicks.co.nz> wrote:
>> 
>> I don't quite see why you would want to use a tuneable 1G optic now
>>days. Generally people use coloured optics to either increase the
>>capacity they can push down a Dark Fibre or to interconnect with a DWDM
>>OTN. In days past using different wavelengths for traffic separation
>>would be not unheard of but in today's world there are many better ways
>>of doing that. The use of tuneable optics reduces sparing and complexity
>>but it is a very difficult and expensive manufacturing task and I can
>>understand why no manufacturer would bother with 1G as that seems like a
>>very small market. If you really want 1G there are plenty of CWDM fixed
>>optics available. If you need more capacity, well really 10G is not at
>>all expensive now days. If you want traffic separation then use MPLS. If
>>you have old 1G only switches, well, you know the answer to that.
>> 
>> My 2c
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>> 
>> -----Original Message-----
>> Hi,
>> 
>> I believe nobody actually answered the original question: is there any
>>tunable SFP module available. Notice the lack of a + in that statement.
>>The datasheets for modules cited in this thread are all 10G modules with
>>minimum speed of 8.5G. Nothing that will work at 1G.
>> 
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