Functions of different modules on an LWF board on BWS 1600G

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Question:
What are functions of OTRG, OTTF, OTRB, OTRH, OTRM, OTRK, OTRC, and T2MZ modules on an LWF board on BWS 1600G?
Answer:
The LWF board supports multiple types of optical modules. WDM-side modules work in the C band (192.1�?96.0 THz) and L band (187.00�?90.90 THz) with the channel spacing being 50 GHz and 100 GHz respectively.
The SDH side can be equipped with the SSA3OTRL and purchased transponders. The WDM side can be equipped with transponders, including SSE1OTRH, SSE1OTRB, SSE1OTTF, and SSE1OTRK. The board software identifies the module type by reading EEPROM data. SSE1OTRH uses 40 wavelengths in the C-band with 100 GHz channel spacing. The dispersion tolerance is greater than 800 ps/nm. The dispersion-limited space is 40 km.
SSE1OTRM uses 160 wavelengths with the wavelength locking function. The channel spacing is 50 GHz. The dispersion tolerance is greater than 800 ps/nm. The dispersion-limited space is 40 km.
SSE1OTRB uses 160 wavelengths with VOA and wavelength locking functions. The channel spacing is 50 GHz.
SSX1T2MZ uses 160 wavelengths with the VOA function but without the wavelength locking function. The channel spacing is 50 GHz.
SSE1OTTF uses tunable wavelengths with the wavelength locking function.
SSE1OTRK uses 40 wavelengths in the C-band with 100 GHz channel spacing. SSE2OTRK uses 160 wavelengths with the wavelength locking function. The channel spacing is 50 GHz.

Other related questions:
Functions and normal working ranges of the bias current, cooling current, and back facet current of OA boards on BWS 1600G devices
Question: What are the functions and normal working ranges of the bias current, cooling current, and back facet current of OA boards on BWS 1600G devices? Analysis: The bias current of an OA board is actually the drive current of the laser on the OA board. A laser is actually a photodiode. Therefore, the drive current is also called bias current. Due to the differences between pump lasers, the bias current also varies greatly for lasers of the same type (for example, 100 mW 980 nm pump lasers). The bias current ranges for different pump lasers are as follows: 100 mW 980 nm pump laser: 250 mA 150 mW 980 nm pump laser: 350 mA 160 mW 1480 nm pump laser: 700 mA Strictly speaking, cooling current should be temperature control current, which is classified into cooling current and heating current. The laser core temperature must be kept at 25°C; otherwise, the output wavelengths and output power are affected. In normal cases, the laser emits heat. Therefore, the temperature control performance is cooling. When the environment temperature is low, the temperature control performance may be heating, and the temperature control current may be 0. To be specific, laser heating and heat dissipation are dynamically balanced. The heating current and cooling current vary depending on changes of the ambient temperature and input optical power. Generally, the current values are as follows (the cooling current is a positive value and the heating current is a negative value): 980 nm pump laser: 1.6 A (cooling current), 0.4 A (heating current) 1480 nm pump laser: 2.2 A (cooling current), 0.8 A (heating current) Back facet current: Each laser uses an internal optical path to reflect a part of output light to the internal PIN tube for check and then outputs the back facet current. The original purpose is to check laser working status based on the back facet current. However, the detected laser back facet current is inaccurate. Therefore, only the circuit is checked and the check result is reported. The only requirement for the back facet current is that the current value is not 0.

Whether an OHP2 board of a BWS1600G can be replaced by an OHP board of a BWS320G
An OHP2 board of a BWS 1600G cannot be replaced by an OHP board of a BWS 320G. BWS 320G also has 71OHP and 72OHP boards.

Whether OSN 6800 boards can be used in the BWS 1600G
No NG WDM board can be used in the BWS 1600G.

Whether an SSE7LWFT01 board on a BWS 1600G supports wavelength tunable optical modules
In the board name, T indicates tunable wavelengths. The SSE7LWFT01 board supports wavelength tunable optical modules.

Whether the SSE7LWFT01 board of BWS 1600G supports wavelength tunable optical modules
The feature code T indicates that the wavelength is tunable. The SSE7LWFT01 board is a wavelength tunable board.

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