[c-nsp] cisco optics for longhaul fiber

[Vinny Abello]

I've done something extremely similar with the Transition Networks
TN-GLC-ZX-SM-15 which is rated for ~150km and had excellent success.
This was going over about a 115km span, but due to expected loss at each
junction and the optical properties of the fiber given to me, the
ZX-SM-15 was much safer. My 6506-E's don't complain at all about them
and I get full DOM capability. Of course if you open a ticket with Cisco
and they notice a non-Cisco SFP in your equipment, they'll likely not
support you until you remove or replace it. When speaking to Cisco about
what their solution was, they quoted me multiple tens of thousands of
dollars for some ONS DWDM EDFA amplifier and dispersion compensation
solution... vs Transition Networks couple of grand per SFP which is all
I needed for my application. Once we need to expand, we'll look into the
DWDM solutions down the road, but for now this just works.

ITU Channel not available (Wavelength not available),
Transceiver is internally calibrated.
mA: milliamperes, dBm: decibels (milliwatts), NA or N/A: not applicable.
++ : high alarm, +  : high warning, -  : low warning, -- : low alarm.
A2D readouts (if they differ), are reported in parentheses.
The threshold values are calibrated.

                            High Alarm  High Warn  Low Warn   Low Alarm
           Temperature         Threshold   Threshold  Threshold  Threshold
Port       (Celsius)          (Celsius)   (Celsius)  (Celsius)  (Celsius)
---------- ------------------  ----------  ---------  ---------  ---------
Gi1/1        26.2                85.0        80.0        -5.0      -10.0

                            High Alarm  High Warn  Low Warn   Low Alarm
            Voltage            Threshold   Threshold  Threshold  Threshold
Port        (Volts)            (Volts)     (Volts)    (Volts)    (Volts)
----------  ---------------    ----------  ---------  ---------  ---------
Gi1/1       3.28                  3.47        3.40        3.20       3.12

                            High Alarm  High Warn  Low Warn   Low Alarm
            Current            Threshold   Threshold  Threshold  Threshold
Port        (milliamperes)     (mA)        (mA)       (mA)       (mA)
----------  -----------------  ----------  ---------  ---------  ---------
Gi1/1        22.1                95.0        90.0         4.0        2.0

            Optical            High Alarm  High Warn  Low Warn   Low Alarm
            Transmit Power     Threshold   Threshold  Threshold  Threshold
Port        (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
----------  -----------------  ----------  ---------  ---------  ---------
Gi1/1         2.4                 6.0         5.0         0.0       -1.0

            Optical            High Alarm  High Warn  Low Warn   Low Alarm
            Receive Power      Threshold   Threshold  Threshold  Threshold
Port        (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
----------  -----------------  ----------  ---------  ---------  ---------
Gi1/1       -28.8                -8.0        -9.0       -37.0      -35.2


-Vinny

On 6/30/2011 11:05 PM, Justin M. Streiner wrote:
> On Thu, 30 Jun 2011, Mark Kent wrote:
>
>> On 6509 equipment, with WS-SUP720-3B, I have to drive fiber as:
>>
>>  1310 nm reaching 35km
>> and
>>  1550 nm reaching 80km
>
> Last summer, I lit a pair of dark fiber links with gig-e line drivers
> that were loaded with optics that can drive up to 120 km at 1550nm. 
> The actual distance ended up being about 67 miles (about 110 km IIRC),
> with a 2-point loss of 22 dBm (optics are rated to a minimum receive
> sensitivity of -32 dBm).  As much as I wanted to use Cisco optics that
> I could plug directly into the 6509s at each end, nothing in their
> portfolio would drive a link that far, short of going to optical
> transport shelves...
>
> The line drivers and optics we purchased were from Transition
> Networks. The management of the devices is a little clunky, but other
> than setting IP addresses and pulling management/performance stats,
> there's not much you need to do from it.  Aside from the management
> clunkiness, the boxes themselves have performed flawlessly.  There is
> also a redundant power supply option for the line driver chassis.  If
> you're interested, I can dig up part numbers, etc...
>
> The layout looks like this (pardon the ASCII art ;)  )
>
> jms
>
>                       6509
>                       |  | <-2x GE interfaces with Cisco SX SFPs
>                       |  |
>                      ------ <-2x GE interfaces with Transition SX SFPs
>                      driver
>                      ------
>                       |  | <-2x GE interfaces with Transition ZX-120 SFPs
>                       |  |
>                110 km of dark fiber
>                       |  |
>                       |  | <-2x GE interfaces with Transition ZX-120 SFPs
>                      ------
>                      driver
>                      ------ <-2x GE interfaces with Transition SX SFPs
>                       |  |
>                       |  | <-2x GE interfaces with Cisco SX SFPs
>                       6509
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