UFB DFAS Lawful Interception
Hi All. Does anyone here know what the LFC's are doing for LI on dark fibre? I think most will be some kind of splitter but one LFC is talking about using a 50/50 split introducing 3db of loss into each leg and I'd like to get an idea of what the others are doing. Normally I'd look at the CFH tech specs but LI on DFAS came after them and there's no reference in the agreements Cheers :) TRISTRAM CHEER UBER GROUP LIMITED NETWORK ARCHITECT - MOST PROBLEMS ARE THE RESULT OF PREVIOUS SOLUTIONS... [Facebook]https://www.facebook.com/UberGroup?_rdr=p [Twitter] https://twitter.com/ubergroupltd E: t(a)uber.co.nzmailto:t(a)uber.co.nz P: 09 438 5472 Ext 803 | M: 022 412 1985 | W: www.uber.co.nzhttp://www.uber.co.nz 53 PORT ROAD | PO BOX 5083 | WHANGAREI | NEW ZEALAND
Hey,
I've heard stories of Citylink having issues on wholesale'd Chorus DFAS
circuits in the past where the splitter / LI / monitor circuit was bodged
and caused too much attenuation resulting link problems...
Though I haven't ever experienced any issues on my Auckland DFAS circuits.
Would be interested to see some actual spec on this if someone can dig it
up.
Cheers
Liam
On 4 December 2015 at 13:29, Tristram Cheer
Hi All.
Does anyone here know what the LFC’s are doing for LI on dark fibre? I think most will be some kind of splitter but one LFC is talking about using a 50/50 split introducing 3db of loss into each leg and I’d like to get an idea of what the others are doing. Normally I’d look at the CFH tech specs but LI on DFAS came after them and there’s no reference in the agreements
Cheers J
TRISTRAM CHEER UBER GROUP LIMITED NETWORK ARCHITECT - MOST PROBLEMS ARE THE RESULT OF PREVIOUS SOLUTIONS...
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*E: *t(a)uber.co.nz *P: *09 438 5472 Ext 803 |* M: *022 412 1985 | *W: *www.uber.co.nz 53 PORT ROAD | PO BOX 5083 | WHANGAREI | NEW ZEALAND
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-- Kind Regards Liam Farr Maxum Data +64-9-950-5302
Hi Tristram,
There is no standard nor guidance, as a DFAS carries no guarantee of
distance or optical loss.
(Nor should it, otherwise I'd have some people asking me to break the laws
of physics to get their 20 km over 2dBm loss.)
LI was required as per the original TICA 2004 - long predating CFH.
I (unofficially) recommend that everyone build in *at least* 4dBm headroom
into links, not just for LI - we've seen optics degrade over time, circuits
moved & respliced for faults, migrations/grooming of services, equipment
room "reorganisations", etc.
Thanks,
Jed.
Sent from a small screen.
On 4 Dec 2015 1:29 p.m., "Tristram Cheer"
Hi All.
Does anyone here know what the LFC’s are doing for LI on dark fibre? I think most will be some kind of splitter but one LFC is talking about using a 50/50 split introducing 3db of loss into each leg and I’d like to get an idea of what the others are doing. Normally I’d look at the CFH tech specs but LI on DFAS came after them and there’s no reference in the agreements
Cheers J
TRISTRAM CHEER UBER GROUP LIMITED NETWORK ARCHITECT - MOST PROBLEMS ARE THE RESULT OF PREVIOUS SOLUTIONS...
[image: Facebook] https://www.facebook.com/UberGroup?_rdr=p [image: Twitter] https://twitter.com/ubergroupltd
*E: *t(a)uber.co.nz *P: *09 438 5472 Ext 803 |* M: *022 412 1985 | *W: *www.uber.co.nz 53 PORT ROAD | PO BOX 5083 | WHANGAREI | NEW ZEALAND
_______________________________________________ NZNOG mailing list NZNOG(a)list.waikato.ac.nz http://list.waikato.ac.nz/mailman/listinfo/nznog
participants (3)
-
Jed Laundry -
Liam Farr -
Tristram Cheer