Q: How is the SXCSA configured inside OptiX OSN chassis regarding slot assignment, 1+1 hot-redundancy, and cross-generation compatibility?

The SXCSA board is installed in the dedicated cross-connect slots of Huawei OptiX OSN chassis (such as Slot 9 and Slot 10 in OSN 3500, or matched core slots in OSN 1500B/2500). It supports deterministic 1+1 hardware-level hitless active/standby redundancy over dual-rail backplane buses. Upon primary fault detection or hot-extraction, switchover completes within the carrier-grade < 50 ms window in full compliance with ITU-T G.841, preserving optical payloads with zero frame disruption. The board supports live hot-swapping and hitless firmware synchronization, providing backward interoperability with legacy optical line cards (e.g., SL16, SL64) and tributary units (e.g., PQ1, D75S) without rack rewiring.

Question 1

What are the core cross-connect capacities, clock synchronization specs, and power metrics of the Huawei SXCSA (HW-OPT-SXCSA-XC) board?

Accepted Answer

The Huawei SXCSA is a high-order space cross-connect and system timing board engineered for OptiX OSN optical platforms. Electrically, it operates off redundant backplane-fed -48V/-60V DC power rails (voltage range: -38.4V to -72V DC) with a typical power consumption of < 40 W. For synchronization, the SXCSA integrates an onboard high-stability Oven-Controlled Crystal Oscillator (OCXO) conforming to ITU-T G.813, G.823, and G.825 standards. It delivers free-run clock accuracy better than ±4.6 ppm and a 24-hour holdover stability superior to 5×10^-10/day. The hardware-based, non-blocking spatial switching matrix supports seamless grooming of VC-4, VC-3, and VC-12 containers at wire speed, ensuring bit error rates below 10^-12 and sub-nanosecond phase alignment.

Question 2

How is the SXCSA configured inside OptiX OSN chassis regarding slot assignment, 1+1 hot-redundancy, and cross-generation compatibility?

Accepted Answer

The SXCSA board is installed in the dedicated cross-connect slots of Huawei OptiX OSN chassis (such as Slot 9 and Slot 10 in OSN 3500, or matched core slots in OSN 1500B/2500). It supports deterministic 1+1 hardware-level hitless active/standby redundancy over dual-rail backplane buses. Upon primary fault detection or hot-extraction, switchover completes within the carrier-grade < 50 ms window in full compliance with ITU-T G.841, preserving optical payloads with zero frame disruption. The board supports live hot-swapping and hitless firmware synchronization, providing backward interoperability with legacy optical line cards (e.g., SL16, SL64) and tributary units (e.g., PQ1, D75S) without rack rewiring.

Key specifications	Value
Board Type	High-order space cross-connect matrix and system clock main control board
Port Density & Specs	Fully hardware-based granular high-speed non-blocking space cross-connect backplane slot
Supported Chassis	Core slot of the Huawei OptiX OSN series optical transport platform
Subscriber Capacity	Built-in high-stability oven-controlled crystal oscillator (OCXO), supporting 1+1 millisecond-level hitless hot-standby switchover
Typical Power Consumption	< 40 W
Operating Temperature	0°C ~ +45°C

Huawei SXCSA Higher-Order Cross-Connect & Clock Board

What this product is

What this product is

What problem it solves

Who and where it is for

Core advantages

Technical specifications

Applications

Carrier optical transport core service grooming

Mission-critical utility and railway timing networks

High-capacity metropolitan aggregation centers

Frequently asked questions

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