Product Overview
A1: The ZXA10 C300 is a carrier-class large-capacity optical access convergence platform, designed for mass FTTx (FTTH/FTTB/FTTO) rollouts. It serves as a key device in fiber-optic access networks, aggregating traffic from ONUs (Optical Network Units) and connecting to metro/core networks. It is widely used in residential, enterprise, and mobile backhaul scenarios, supporting triple-play services (IPTV, VoIP, HSI) and future-proof network evolution.
Q2: What are the key advantages of the ZXA10 C300 OLT?
A2: Its core advantages include: ① Unified platform supporting GPON/XGPON1/P2P technologies for flexible deployment; ② High capacity and density with up to 16,384 GPON subscribers and 14/16 service card slots; ③ Carrier-grade reliability via key component redundancy (power, control board) and PON uplink/downlink protection mechanisms; ④ Comprehensive QoS and security features for service differentiation and user data protection; ⑤ Future-proof design supporting NG-PON (TWDM PON) and IPv4/IPv6 dual stack.
Technical Specifications
Q3: What are the chassis configurations and slot allocations of the ZXA10 C300?
A3: It offers two chassis options: ① 21-inch chassis (10U height) with 23 slots (16 universal line card slots, 2 switch&control slots, 2 power slots, 2 uplink/cascading slots, 1 environment detection slot); ② 19-inch chassis (10U height) with 21 slots (14 universal line card slots, 2 switch&control slots, 2 power slots, 2 uplink/cascading slots, 1 environment detection slot). The backplane exchange capacity reaches up to 5.76 Tbit/s, ensuring wire-speed forwarding.
Q4: What line cards and uplink interfaces does the C300 support?
A4: Line card options include: ① GPON cards (8/16 ports per card); ② XGPON1 cards (8 ports per card); ③ P2P cards (24/48 ports per card). Uplink interfaces support multiple configurations: 4×10GE, 2×10GE+2×GE, 4×GE (optical/electrical), as well as TDM interfaces (E1/T1, STM-1/STM-4) for legacy service integration. Link aggregation (IEEE 802.3ad) is supported for enhanced bandwidth and reliability.
Q5: What is the maximum transmission distance and splitting ratio of the C300?
A5: It supports a maximum logical transmission distance of 60 km and a splitting ratio of up to 1:256 for GPON/XGPON networks, adapting to various deployment scenarios from urban to rural areas. The GPON transceivers comply with ITU-T G.984.x (Class B+/C+), and XGPON1 transceivers meet ITU-T G.987.x (Class N1/N2a).
Function & Performance
Q6: What service and security features does the C300 provide?
A6: Service capabilities: Supports IPTV multicast (IGMP v1/v2/v3 snooping/proxy, 256 multicast VLANs), VoIP, VPN, and mobile backhaul. Security features include: ONU authentication, port isolation, MAC/IP address binding, packet filtering, broadcast suppression, and AES-128 encryption for GPON traffic, ensuring end-to-end data security.
Q7: How does the C300 ensure QoS for different services?
A7: It adopts comprehensive QoS mechanisms: ① 8 service classes (802.1p) with SP/DWRR/SP+DWRR queue scheduling; ② DSCP Differentiated Services for IP traffic; ③ Per-service bandwidth control (CIR/PIR/CBS); ④ H-QoS for fine-grained traffic management; ⑤ VLAN stacking (QinQ, IEEE 802.1ad) for service isolation, ensuring clear voice, smooth video, and high-speed internet access.
Q8: Does the C300 support clock synchronization and network management?
A8: Yes. It supports 1588v2, Synchronous Ethernet, 1PPS+TOD, and external clock interfaces (Bits/HZ) for precise time synchronization, critical for mobile backhaul. Network management is available via CLI (Telnet/SSH), SNMP v1/v2/v3, and a web-based interface, enabling remote configuration, monitoring, and fault diagnosis.
Troubleshooting & Maintenance
Q9: What should I do if an ONU fails to register with the C300?
A9: Troubleshoot step-by-step: ① Check optical power (GPON Class B+: -8~-28 dBm; Class C+: -8~-32 dBm) and fiber continuity; ② Verify ONU authentication settings (SN/Password-based) match the C300 configuration; ③ Check ONU type profile and DBA template configuration; ④ Inspect PON port status (no shutdown) and ensure no port isolation or VLAN mismatches; ⑤ Use embedded OTDR (in SFP) to detect fiber faults if necessary.
Q10: How to resolve uplink bandwidth bottlenecks or link instability?
A10: Solutions include: ① Enable link aggregation (IEEE 802.3ad) to combine multiple uplink ports for higher bandwidth; ② Check LACP/STP/RSTP configuration to avoid loopbacks; ③ Verify DBA template settings to allocate bandwidth reasonably for upstream traffic; ④ Replace faulty SFP modules or check optical fiber attenuation; ⑤ Monitor uplink port traffic via RMON II to identify congestion points.
Q11: What are the common causes of multicast (IPTV) service interruptions?
A11: Common causes and fixes: ① IGMP snooping/proxy not enabled on the PON port; enable it and confirm multicast VLAN configuration; ② Multicast group limit exceeded (max 1k groups); adjust group capacity settings; ③ CAC (Call Admission Control) blocking new streams; optimize CAC parameters; ④ Fiber attenuation too high causing packet loss; test and repair the fiber link.
Deployment & Compatibility
Q12: What is the operating environment requirement for the C300?
A12: It supports harsh operating conditions: Temperature range -25℃~+55℃ (storage: -40℃~+65℃); humidity 5%~95% (non-condensing); power supply: -48V DC (working range -38.4V~-72V) with dual power redundancy, optional 220V/110V AC input for specific models.
Q13: Is the C300 compatible with third-party ONUs and future NG-PON technologies?
A13: It is compatible with ONUs compliant with ITU-T G.984.x (GPON) and G.987.x (XGPON1) standards, supporting interconnection with mainstream third-party ONUs. For future evolution, it supports smooth migration to NG-PON2 (TWDM PON) via line card replacement, protecting investment without full system upgrade.
