1000BASE-BX40 optical Ethernet specifications

Overview

The 1000BASE-BX40 PTMs can be used for GbE service over Single-Mode Fiber (SMF).

System specifications

The following are the 1000BASE-BX40 system specifications:

• Optical Line Rate: 1.25 Gb/s (±100 ppm)

• Opical Line Coding: 8B/10B

• Fiber Type: 10 μm SMF

• Minimum Range: 2 to 40,000 meters

• Performance: Long-reach (40 km)

• Temperature range: Industrial temperature (−40°C to +85°C)

Transmitter specifications

The 1000BASE-BX40 optical transmitter meets the specifications listed in the following table.

Table 10-50: 1000BASE-BX40 transmit specifications

Description	1000BASE-BX40 Downstream	1000BASE-BX40 Upstream
Transmitter type	Longwave Laser
Signaling speed (range)	1.25 GBd (±100 ppm)
Wavelength (λ)	1480 to 1500 nm	1260 to 1360 nm
Maximum Spectral Width (Δλ20)	1.0 nm	1.0 nm
Average launch power (max)	+2.0 dBm	+2.0 dBm
Average launch power (min)	−3.0 dBm	−3.0 dBm
Average launch power of OFF transmitter (max)	−45.0 dBm	−45.0 dBm

Receiver specifications

The 1000BASE-BX40 receiver meets the specifications defined in the table below.

Table 10-51: 1000BASE-BX40 receive specifications

Description	1000BASE-BX40 Downstream	1000BASE-BX40 Upstream
Signaling speed (range)	1.25 GBd (±100 ppm)
Wavelength (λ)	1260 to 1360 nm	1480 to 1500 nm
Average receive power (max)	−3.0 dBm	−3.0 dBm
Receive sensitivity	−25.0 dBm	−25.0 dBm
Return loss (min) 1	12.0 dB	12.0 dB

Notes:

1. Refer to the IEEE 802.3 standards for more information about return loss (min).

Link budgets

The worst-case power budget and link penalties for a 1000BASE-BX40 channel are shown in the table below.

Table 10-52: 1000BASE-BX40 link budgets and penalties

Parameter	1000BASE-BX40 Downstream	1000BASE-BX40 Upstream
Maximum Channel Insertion Loss	21.0 dB	21.0 dB
Minimum Channel Insertion Loss	5.0 dB	5.0 dB
Maximum Dispersion	700 ps/nm	|256| ps/nm
Optical Path Penalty	1.0 dB	1.0 dB
Target Distance 1	40 km	40 km

Notes:

1. The target distance assumes that passive optical units are not being used.