IP Masterclass [Part 5]: IP Networks for CCTV | Archive Titles

Fig 1: Comparing the strengths and weaknesses of VCRs
DVRs used in conventional analogue systems removed these limitations
Strengths of VCRs	Limitations of VCRs
a solid industry standard, and widely used by other agencies such as the Police	requirements for operator activity for tape changing/rotation/replacement
inexpensive and highly robust devices	limited storage volume, and tapes
inexpensive consumables (tapes)	end to end rewind time is some 3 minutes, making searching slow in comparison to searching any disk-based storage
recent features have increased the scope of VCRs including Time/Alarm/Event searching, and scope for up to 40 days recording in time-lapse mode	cannot simultaneously record and playback