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Description
Cudy 24-Port Gigabit PoE+ Switch with 2 Gigabit SFP PortsFeatures: IEEE 802. 3af 802. 3at standard compliant 300 watts total PoE power budget, up to 30 watt per port 24 x GbE PoE+ Port and 2 x SFP Port CCTV Mode supports remote power & data feeding up to 250 meters VLAN mode supports 24 POE+ ports isolated from each other LED indicators for network diagnostics 19 inch metal case, internal power design Model GS1028PS2 PoE standard IEEE802. 3, IEEE802. 3u, IEEE802. 3ab, IEEE802. 3z, IEEE802. 3x, IEEE802. 3af,
Features:
- IEEE 802.3af/802.3at standard compliant
- 300 watts total PoE power budget, up to 30-watt per port
- 24 x GbE PoE+ Port and 2 x SFP Port
- CCTV Mode supports remote power & data feeding up to 250 meters
- VLAN mode supports 24 POE+ ports isolated from each other
- LED indicators for network diagnostics
-
19-inch metal case, internal power design
| Model | GS1028PS2 |
| PoE standard | IEEE802.3, IEEE802.3u, IEEE802.3ab, IEEE802.3z, IEEE802.3x, IEEE802.3af, IEEE802.3at |
| Network Media(Cable) | 10 BASE-T: UTP category 3, 4, 5 cable (≤100m) 100 BASE-TX: UTP category 5 cable (≤100m) 1000 BASE-T: UTP category 5e cable (≤100m) 1000 BASE-X: MMF or SMF SFP module |
| MAC Address Table | 8K, Auto-learning, Auto-aging |
| Transfer mode | Store-and-Forward |
| Frame Forward Rate | 10 Base-T: 14881pps/Port 100 Base-TX: 148810pps/Port 1000 Base-T/X: 1488095pps/Port |
| Switching Capacity | 56Gbps |
| Dimensions (L*W*H) | 440 * 207 * 44 mm |
| Fan | 2/Fanless |
| Power Input | AC: 100~240V, 50/60Hz |
| PoE Port | Port1~24 |
| PoE Power on RJ45 | Mode A 1/2(-), 3/6(+) |
| PoE Power Output | 30W (Max) |
| PoE Power budget | 300Watts |
| Temperature | Operating Temperature: 0°C ~ 40 °C (32 °F ~104°F ) Storage Temperature: -40 °C ~ 70 °C (-40 °F ~158°F ) |
| Humidity | Operating Humidity: 10% ~ 90% non-condensing Storage Humidity: 5% ~ 90% non-condensing |
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4.1 ★★★★★
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Product Reviews
★★★★★ 5
Timely delivery.
Format: Paperback
I got the ordered item within the time. The book was in good shape
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2025
★★★★★ 5
Worth it
Format: Paperback
Excellent, needed for class
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Reviewed in the United States on June 11, 2021
★★★★★ 5
Another fine Piece
As with Bowlbys' other works, this classic furthers the hypothesis of negative emotional influence on the continued development of humans as we integrate with our social environments. I liked it...in fact, liked all of Bowlbys' writings.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 12, 2013
★★★★★ 5
Five Stars
A MUST HAVE BOOK FOR anyone interested in parenting! or have kids.
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Reviewed in the United States on March 20, 2015
★★★★★ 4
A Groundbreaking Classic on Young Child Development
Format: Paperback
This first volume of John Bowlby's trilogy on Attachment and Loss expands and builds upon an article he published in 1958 in the International Journal of Psycho-Analysis titled "The Nature of the Child's Tie to His Mother", which is perhaps a more telling title than that of the book itself. Attachment, as a technical term in behavioural biology, is first used in describing instinctive mother-following behaviours of young mammals and birds (first observed and reported in delightful accounts by the Austrian ethologist Konrad Lorenz in the 1930's).
By comparing data collected during and after the Second World War by childcare workers and researchers in U.K. and North America, Bowlby found a striking common pattern of distressed behaviours among young children between the ages of one and three when separated from mother for an extended period: first in Protest, then Despair and finally Detachment - a psychopathological state when a child becomes socially uninitiated and withdrawn, even to his returning mother. Bowlby then postulates that physical proximity to a mother-figure is essential to a child's development of cognitive capacities, especially during a sensitive period around six months to two years after birth. Attachment behaviours, like those of young mammals and birds, are present in the human baby too. This has since led to a blossoming of research activities in development psychology and psychoanalysis, as well as neurophysiology recently, which supplies much fresh evidence about the young brain and its phenomenal maturing in the first two years. Attachment theory has since contributed significantly to understanding of our own selves, informed the age-old philosophical debate on nature or nurture, and brought our attention to fundamental issues in child-rearing such as sensitive periods of development, the difference between attachment (conducive to security) and dependence (symptomatic of insecurity), the distinction between anxiety from separation and fear of the unfamiliar, etc.
This new edition is a timely reprint of a classic account of attachment theory as formulated by the originator. While primarily an academic work, with a few chapters deemed more for an academic jury (about Freud and instinctive behaviours, etc.), it is mostly very readable, and certainly captivating to those with access to young babies, of whose behaviours are given an enlightening perspective. This volume focuses on attachment, with subsequent volumes on its loss in temporary and permanent terms respectively.
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Reviewed in the United States on September 4, 2003