Specifications

Chapter 1 Introduction Optimux-XLT1 Installation and Operation Manual

1-4 Functional Description

1.3 Functional Description

Fiber Optic Link Interface

The Optimux-XLT1 can be ordered with a fiber optic link interface. The optical

interface is used to extend the transmission range to 60 km (37.28 miles), enhance

the transmission security and achieve immunity against electrical interference.

The fiber optic interface complies with the ITU-T Rec. G.956, while applying a

proprietary signaling format to the NRZ 34 Mbps data stream. In the upstream

direction, the data stream modulates the beam emitted by the optical device,

which is either a LED or a Laser diode. In the downstream direction, the data

stream is recovered from the current changes in a diode sensitive to the received

optical beam.

Various optical interfaces meet a range of customer and infrastructure needs.

Table 1-1 shows the Optimux-XLT1 options in terms of transceiver, fiber optic and

maximum transmission range. The maximum transmission range is a function of

the optical budget (transmitter power minus receiver sensitivity), the fiber optic

attenuation per kilometer and the necessary margin due to CO connections, aging,

etc. A typical 3 dB margin has been assumed to calculate the maximum range in

Table 1-1. Front panel LEDs indicate loss-of-signal frame and AIS on the link.

It is possible to add a redundant fiber optic link to an existing unit or to replace the

link module by the 850 nm multimode AMC-101 module or any of the single

mode AMC-101 modules.

Table 1-1. Fiber optic Interface Options

Wavelength

(nm)

Fiber Type (µ

µµ

µm)

Transmitter

Type

Power

(dBm)

Receiver

Sensitivity (dBm)

Typical Max. Range

(km / miles)

850 62.5/125 multimode LED -18 -28 2.5/1.55

1300 62.5/125 multimode LED -18 -31 5.5/3.4

1300 9/125 single mode LED -15 -31 32/20

1300 9/125 single mode Laser -12 -31 38/23.6

1300 9/125 single mode Laser (long haul) -2 -34 70/43.4

1550 9/125 single mode Laser -12 -31 68/42.2

1550 9/125 single mode Laser (long haul) -1 -34 110/68.35

1300/1550 9/125 single mode Laser (WDM) -12 -30 40/24.8

Order from: Cutter Networks

Ph:727-398-5252/Fax:727-397-9610