Network Video Recorders (NVRs) are the storage brains of any IP camera CCTV system — receiving RTSP streams over Ethernet, transcoding for storage, running motion analytics, and serving remote clients over Hik-Connect / DMSS mobile apps. CSL Systems stocks the complete Hikvision, Dahua, and Uniview NVR lines from 4-channel entry-level to 128-channel enterprise recorders with built-in PoE.NVR channel-count guide by project size:4-channel NVR (Hikvision DS-7604NI-Q1) — home / small shop, up to 4 IP cameras. ৳9,500 to ৳12,500.8-channel PoE NVR (Hikvision DS-7608NI-K2/8P, Dahua NVR4108HS-P) — office, café, clinic. ৳18,500 to ৳24,000.16-channel PoE NVR (DS-7616NI-Q2/16P) — small factory, showroom, small hotel. ৳32,000 to ৳42,000.32-channel PoE NVR (DS-7732NI-K4/16P) — school, hospital, mid-factory. ৳58,000 to ৳78,000.64/128-channel NVR (DS-96128NI-I16) — enterprise, city surveillance, campus. ৳2,50,000+.Storage sizing rule: for each 4MP camera at H.265+ compression, budget ~30GB per day for 24×7 recording. A 16-camera setup at 60-day retention = ~29TB → 2× 16TB Skyhawk in RAID-1. All NVRs support hot-swap SATA HDDs; enterprise models add RAID-5/6 and dual power supply.Compatible cameras: ONVIF-standard IP cameras from any manufacturer work with mixed-brand NVRs, but same-brand pairing gives you full-feature support (people counting, ANPR, face search, HikCentral integration). All NVRs support H.265+ compression, mobile app P2P access, and multi-user viewing.Call 01972277100 for NVR sizing consult based on your camera count, retention days, and analytics requirements. See our Hikvision price list for full model coverage.