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RE: Relative OSP Costs of PON vs. P2P

Few remarks.

CPE should have 1310 FP, readily available with 3nm max spectral width.

HE electronic for p2p requires 16 transceivers compared with one for PON
with 1:16 split.  PON is shared hence can deploy DFB and still be
cheaper overall.

At 1GbE Rx sensitivity can be -26 dBm and definitely can be spec'ed as
-24 dBm.


|  Meir Bartur, Ph.D.     |
|  Zonu Inc.              |
|  6005 Yolanda Ave       |
|  Tarzana, CA  91356-1421|
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> ----------
> From: 	Carlisle, Robert S
> Sent: 	Wednesday, June 06, 2001 12:58 PM
> To: 	'efmoptics@xxxxxxxxxxxxxxxxxxxxxxx'
> Subject: 	Relative OSP Costs of PON vs. P2P
> All,
> I wanted to share some relative Outside Plant (OSP) costs based on
calculations from analysts here at HQ and my colleagues at Corning Cable
Systems.  Based on fixed electronics cost at the Head End (HE) and in
the customer premises (CPE), the relative cost of the OSP is about 41%
of the total cost for 1 fiber to the home and 52% of total cost for 2
fibers for a Point to Point network.  For a PON, the relative cost of
the OSP is about 13-18% of the total cost.  In other words, OSP costs
for a P2P network are roughly 2X the cost for a PON.  OSP costs include
the feeder and distribution cables, splices and connectors, trenching
and/or drops, and splice enclosures.  Of course, as the cost of the
electronics at the HE and at the CPE drop, the relative cost of the OSP
will go up.  What I don't know and would like to see some discussion on,
is the difference in the cost of the electronics in the HE for a P2P vs.
PON.  I expect that since the management functions of a PON are more
complex, the costs of the electr
> I also wanted to share an Excel graph showing the upstream reach of a
1500 nm FP in a 1X16 split EPON.  Assumptions made:  
> *	21 dBm power budget between the TX and RX (0 dBm TX and -21 dBm
receiver sensitivity @ 1 GBPS).
> *	Losses to splices, split, connectors, and 4 dB link margin -
20.4 dB
> *	Spectral width of FP laser - 5 nm
> *	Attenuation of fiber @ 1500 nm - .21 dB/km (vice .34 at 1310)
> Take aways from this:
> Dispersion limited using standard single mode fiber so consider using
dispersion shifted fiber if desirable to use cheaper FP laser in CPE.
> Does not reach the sweet spot of 10 km @ 1 GBPS so:
> 	Must live with lower link margin or
> 	Increase power of laser or
> 	Increase sensitivity of receiver
> Is this technically feasible?
> >  <<exportablelink.xls>> 
> Best Regards,
> Rob Carlisle
> Rob Carlisle
> Senior Market Development Engineer
> Optical Fiber
> v: 607 974-6806
> f: 607 974-7522
> c:607 368-5442