P420A
日期：2019-12-17
开关量就是触点状态的接通或者断开，又或者是逻辑电平的高低等。开关量在楼宇监控，机电保护，电力网自动化中有非常普遍的应用。在很多的场合都是利用开关量来实现各个设备之间的联动。但是一般来说，开关量的额定电流不完全相同，而且联动设备相互之间的距离比较远，完全利用原有的开关量来驱动另外的设备是不合时宜的。
在某楼宇监控项目中，要求火灾报警信号与监控中心的消防系统可以进行联动，即一旦发生火灾报警信号，监控中心的消防系统就立即进行启动。但是系统集成商在实际施工中，发现有如下几个问题：1.火灾报警器与控制中心的距离相隔比较远，火灾报警器的信号不能传导到控制中心。2.火灾报警器与控制中心的消防设备，一个属于弱电信号，一个属于强电信号，不能接在一起进行数据采集设备控制。
在工业自动化控制中，经常会遇到开关量，数字量，模拟量，离散量，脉冲量等各种概念，而人们在实际应用中，对于这些概念又很容易混淆。现将各种概念罗列如下：
1.开关量：一般指的是触点的“开”与“关”的状态，一般在计算机设备中也会用“0”或“1”来表示开关量的状态。开关量分为有源开关量信号和无源开关量信号，有源开关量信号指的是“开”与“关”的状态是带电源的信号，专业叫法为跃阶信号，可以理解为脉冲量，一般的都有220VAC, 110VAC,24VDC,12VDC等信号，无源开关量信号指的是“开”和“关”的状态时不带电源的信号，一般又称之为干接点。电阻测试法为电阻0或无穷大。
2.数字量：很多人会将数字量与开关量混淆，也将其与模拟量混淆。数字量在时间和数量上都是离散的物理量，其表示的信号则为数字信号。数字量是由0和1组成的信号，经过编码形成有规律的信号，量化后的模拟量就是数字量。
3.模拟量：模拟量的概念与数字量相对应，但是经过量化之后又可以转化为数字量。模拟量是在时间和数量上都是连续的物理量，其表示的信号则为模拟信号。模拟量在连续的变化过程中任何一个取值都是一个具体有意义的物理量，如温度，电压，电流等。
4.离散量：离散量是将模拟量离散化之后得到的物理量。即任何仪器设备对于模拟量都不可能有个完全精确的表示，因为他们都有一个采样周期，在该采样周期内，其物理量的数值都是不变的，而实际上的模拟量则是变化的。这样就将模拟量离散化，成为了离散量。
5.脉冲量：脉冲量就是瞬间电压或电流由某一值跃变到另一值的信号量。在量化后，其变化持续有规律就是数字量，如果其由0变成某一固定值并保持不变，其就是开关量。
综上所述，模拟量就是在某个过程中时间和数量连续变化的物理量，由于在实际的应用中，所有的仪器设备对于外界数据的采集都有一个采样周期，其采集的数据只有在下一个采样周期开始时才有变动，采样周期内其数值并不随模拟量的变化而变动。这样就将模拟量离散化了，例如：某设备的采样周期为1秒，其在第五秒的时间采集的温度为35度，而第六秒的温度为36度，该设备就只能标称第五秒时间温度35度，第六秒时间温度36度，而第五点五秒的时间其标称也只是35度，但是其实际的模拟量是35.5度。这样就将模拟信号离散化。其采集的数据就是离散化了，不再是连续的模拟量信号。由于计算机只识别0和1两个信号，即开关量信号，用其来表示数值都是使用数字串来表示，由于计算能力的问题，其数字串不能无限长，即其表达的精度也是有限的，同样的以温度为例，由于数字串限制，其表达温度的精度只能达到0.1度，小于该单位的数值则不能被标称，这样就必须将离散量进行量化，将其变为数字量。即35.68度的温度则表示为35.6度。
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Cisco Systems WS-C6513-E | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems N3K-C3548P-10GX-ref [N3K-C3548P-10GX-ref ref]
Cisco TelePresence MCU MSE 8510 (CTI-8510-MED2-K9)
NEW SEALED Cisco WS-C4507RE+96V+ Catalyst Switch 1YearWarranty 2+Available
Cisco A9K-RSP440-SE CLEAN SERIALS GREAT CONDITION 90 DAY WARRANTY
New Sealed CISCO ASA5545-IPS-K9 5545-X IPS, SW, 8GE Data, 1GE Mgmt, AC, 3DES/AES
Cisco WS-C6504-E Dual P/S 2x VS-S720-10G-3C 1x WS-X6716-10G-3C 1x WS-X6748-SFP
Cisco WS-C3850-48P-L (Refurbished) Cisco Catalyst 3850 48 Port PoE
Cisco Systems AS53-192-DC-RPS-CH
New CISCO ASR1001X-2.5G-K9 ASR1001-X with 6-built-in GE ports w/FLSA1-BIN-1X10GE
NEW IN BOX CISCO ASR1001X-2.5G-K9 ASR1001-X AES Built-in 6x1G *SHIP FAST*
New CISCO ASR1001-X w/ 6-built-in GE ports w/FLSA1-BIN-1X10GE ASR1001X-2.5G-K9
-New- CISCO ASR1001X-2.5G-K9 ASR1001-X 6-built-in GE ports w/FLSA1-BIN-1X10GE
CISCO3945E/K9 Cisco 3945 Router with 4 onboard GE IP Base w/ VIC3-2FXS/DID
Cisco Systems N3K-C3548P-10GX-ref [N3K-C3548P-10GX-ref ref]
CISCO - WS-X45-SUP7-E= - Catalyst 4500 E-Series Supervisor, 848Gbps
New Cisco Systems C3945-UCSE/K9 | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems ASA5580-20-8GE-K9 incl 19% VAT // 2 years IT4Trade warranty
CISCO WS-C4500X-16SFP+ (Refurbished) + C4KX-NM-8SFP+ 16 Port 10G w/ network card
Cisco UCSB-B200-M3 192GB, 2x E5-2695 v2, 2x 600GB 6Gb SAS
CISCO3945E/K9 Cisco 3945 Router with 4 onboard GE IP Base w/ EM-4BRI-NT/TE
CISCO3945E/K9 Cisco 3945 Router with 4 onboard GE IP Base w/ VIC3-4FXS/DID
NEW SEALED Cisco ASA5520-CSC20-K9 Anti-X ASA 5520 Edition 1YearWrnt 2+Available
New Cisco Systems WS-C4900M incl 19% VAT // 2 years IT4Trade warranty
New Cisco Systems N3K-C3064TQ-32T | incl 19% VAT | 2 years Cybertrading warranty
~GOOD CONDITION~ CISCO ASR1002-10G/K9 Chassis w Dual AC Power ~FAST DELIVERY~
NEW IN BOX Cisco AIR-CT5520-K9 Cisco AIR 5520 Wireless LAN Controller SHIP FAST
*NEW SEALED* CISCO ASR1002-X Cisco ASR 1002-X Router bundle SLASR1-IPB license
NEW Cisco WS-C4500X-32SFP+ Catalyst Switch w/ C4KX-PWR-750AC-R Power Supply
*Brand NEW* CISCO AIR-CT5520-K9 Cisco 5520 wireless controller **SHIP TODAY**
CISCO 7603S-S32-10G-B-R | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems 7609S-RSP720C-P
Cisco Systems 7604-RSP720CXL-P
NEW Sealed Cisco AIR-CT5520-K9 Cisco AIR 5520 Wireless LAN Controller
*NEW SEALED* CISCO WS-C3850-48P-E 48 Port Switch + C3850-NM-4-10G Module
NEW Sealed Cisco ASA5525-SSD120-K9 Cisco ASA 5525-X Firewall Edition
New Cisco Systems WS-X4712-SFP+E incl 19% VAT // 2 years IT4Trade warranty
New CISCO ASR1001-X with 6-built-in GE ports with 20G ASR1001X-20G-K9
Cisco 15454-CE-MR-10
CISCO 7603S-S32-10G-B-R | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems 7609S-RSP720C-P
Cisco Systems N2K-C2248PR
Cisco Systems WS-C4507RE-S7L+96
New Cisco Systems C3925E-VSEC/K9 | incl 19% VAT | 2 years Cybertrading warranty
CISCO C3945E-VSEC-CUBEK9 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems C3945-WAASX/K9 | incl 19% VAT | 2 years Cybertrading warranty
New CISCO C2951-S-SRE-WAE/K9 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems PVDM4-64U128 | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems PVDM4-64U256
Cisco Systems 7604-RSP720CXL-P
Cisco A9K-RSP440-SE Route Switch Processor optimized for service edge
CISCO3945E/K9 Cisco 3945 Router with 4 onboard GE IP Base w/ VIC2-2BRI-NT/TE
Cisco UBR-MC3GX60V CMTS DOCSIS 3.0 High Perf. BPE for uBR10012 16US/16DS *NOB*
Cisco WS-C6504-E Dual P/S 1x VS-S720-10G-3C 3x WS-X6708-10G-3C
New Cisco Systems PVDM4-64U128 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems PVDM4-64U256 | incl 19% VAT | 2 years Cybertrading warranty
Cisco 7600-ES+20G3CXL Cisco 7600 Series Ethernet Services Plus 20G Line Card
Cisco Systems WS-C3850-24XU-L incl 19% VAT // 2 years IT4Trade warranty
New CISCO WS-X6848-TX-2TXL | incl 19% VAT | 2 years Cybertrading warranty
CISCO ASR5K-011G2-SX-K9 | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems AS53-192-RPS-CH
CISCO A9K-RSP-4G ASR9K Route Switch Processor w/ 4G memory and Switch Fabric
CISCO N7K-F248XT-25E NEXUS 7000 F2SERIES 48 PORT 1/10G 3 YR WARRANTY
New Cisco Cerent 15454-OPT-EDFA-24 Enhanced C-Band 96 Channel 24dB
NEW IN BOX CISCO WS-C4500X-F-32SFP+ CATALYST GIGABIT SFP SWITCH 1 YEAR WARRANTY
*NEW* CISCO ASR1001-X with 20G Throughput ASR1001X-20G-K9 (2YearsWnty) ASR1001-X
N7K-VDC1K9= Cisco Systems Nexus 7000 Incremental VDC License +4 VDC
Cisco A9K-RSP-8G card
Cisco Catalyst 2948G-GE-TX 48 Port Switch
NEW Sealed DS-X9448-768K9 w/ DS-SFP-FC16G-SW 48-Port 16Gbs Fibre Module MDS 9700
#NEW# Cisco WS-C4500X-F-32SFP+ Catalyst 4500-X 32 Port Switch #FAST SHIPMENT#
! BRAND NEW IN BOX ! CISCO ASA5520-SSL500-K9 Security Appliance ! SHIP FAST !
CISCO WS-X6816-10G-2T | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems ASA5520-CSC20-K9
Cisco Systems ASR1001-X
Cisco Systems WS-C3850-48F-E incl 19% VAT // 2 years IT4Trade warranty
NEW IN BOX Cisco N7K-F132XP-15 Nexus 7000 32 Port 1G/10G Ethernet Module
*Brand NEW* CISCO WS-C3850-48F-E 48 Port Switch + C3850-NM-4-1G Module
NEW IN BOX Cisco N7K-F132XP-15 Nexus 7000 32 Port 1G/10G Ethernet Module
CISCO - ASR1000-ESP10 - ASR1000 Embedded Services Processor, 10G,Spare
New CISCO C3925-VSEC-PSRE/K9 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems N5K-C5010P-BF | incl 19% VAT | 2 years Cybertrading warranty
Cisco WS-X6908-10G-2T C6K 8 port 10 Gigabit Ethernet module NEW in inner box
NEW SEALED GENUINE CISCO QSFP-40G-ER4 - 40GBASE-ER4 QSFP Transceiver - 3YR Warr
ACE30-UPG-04-K9 ACE30-MOD-K9 Cisco Application Control Engine Mod 6500/7600
CISCO A9K-2T20GE-B - 2-Port 10GE, 20-Port GE Line card LC - 3YR Warranty
CISCO UBR10012 w/ ESR-PRE4, MC20X20V-20D, SPA-5X1GE-V2, 2xAC CMTS 3YR Warrant
CISCO UCS-EZ7-B200-P - UCSB-B200-M3, 2xE5-2680v2,256G,VIC1240 + UCSB-MLOM-PT-01
Cisco WS-X6816-10T-2T 16-Port 10 Gigabit Ethernet Copper Module with DFC4
~GOOD CONDITION~ CISCO A9K-MOD80-TR Modular Line Card ~FAST DELIVERY~
NEW Cisco WS-C3850-24XU-L 24 100Mbps/1/2.5/5/10 Gbps UPOE Ethernet ports Switch
Cisco DS-C9148S-K9 12-PORT 16G SAN Switch 68-5131-01 CMMPG00DRA DS-C48S-300AC SS
Cisco CTS-INTP-C90-K9 Video Conferencing Kit 1YearWarranty 2+Available
Cisco A9K-16T/8-B 16-Port 10GE DX Medium Queue Line Card 1YearWaranty 2+Avalable
NEW SEALED Cisco Nexus N9K-SUP-A 9504 Chassis L3 Switch 1YearWaranty 2+Available
New Sealed Cisco NIM-8CE1T1-PRI T1/E1 Expansion Module 1YearWarranty 2+Available
NEW SEALED Cisco 15454-10G-XR Based Optics Card OC-192/STM-64 1YearWrnty 2+Avail
Cisco AS54HPX-4T1-96-AC-V Firewall 1YearWarranty 2+Available
Cisco CRS-4-CH 4-Slot Chassis 42-1GE CRS-8-RP CRS-FP40 4-10GE CRS-4-FC LCC
Cisco C3945E-VSEC/K9 Voice Security Bundle Router
Cisco UCSB-B200-M3 160GB (16GB), MLOM-40G-01, Intel E5-2667 v2
Cisco UCSB-B200-M3 384, 2x Intel E5-2630 v2, 2x 600GB 6Gb SAS
Cisco ASR1001-4XT3 4 GE T3 IDC Router ASR1001-PWR-AC CMMCS00 JWA
Cisco 7604 Chassis 4-Slot CISCO7604 w/ Dual AC, FAN & RSP720-3CXL-10GE *Bundle*
NIB Cisco ASA5585-S10-K9
NOB Cisco N5K-C5020P-BF Switch Chassis N5K-PAC-1200W 40 port 10/100/1000Base-T J
Cisco A9K-40GE-E line card
CISCO NEXUS 9300 48P 1/10G 6P 40G QSFP+ SWITCH N9K-C9372PX SMARTNETABLE
~GOOD CONDITION~ CISCOACE30-MOD-16-K9 Application Control Engine ~FAST DELIVERY~
Cisco Systems CTI-TCS-5RP-K9
Cisco Systems 4-10GE-ITU/C
Cisco ASR 9000 Mod80 Modular Line Card A9K-MOD80-TR
*New Sealed* Cisco WS-C3850-12X48U-S Catalyst C3850 Switch C3850-NM-4-10G Module
Cisco ESA-C680-K9 UCS-C240-M3 Email Security Appliance w/ 2 x CPU, HDD's & RAM
NEW Cisco WS-C3850-48F-E 48 10/100/1000 Ethernet PoE+ ports *Overnight Shipping*
New Cisco Systems AC-PLS-P-3500-S | incl 19% VAT | 2 years Cybertrading warranty
CISCO CRS-16-FC140/S V02 CARRIER ROUTING SYSTEM 16-SLOT SWITCH LINE FABRIC CARD
Cisco A9K-MOD80-TR Mod80 Modular Line Card ASR 9000
New Sealed Cisco AIR-AP2702I-UX-WLC Cisco Aironet 2700 Series Access Points
NEW Sealed Cisco WS-C4507R+E Cisco Catalyst E-Series 4507R+E switch
Cisco UCSC-C220-M3S w/dual P/S E5-2680, 4x 120GBSATA SSD, 5x 4GB DDR3
CISCO - N3K-C3172PQ-10GE - Nexus 3172P 48 x SFP+ and 6 QSFP+ ports
Cisco Systems L-ASA5555-IPS-SSP
Cisco Systems ASA5555-IPS-SSP
*New* Cisco SPA-1X10GE-WL-V2 10 Gigabit Ethernet Shared Port
*New* Cisco ASR1002-X Aggregation Service Router, 6 Port GE, Dual A/C Power
Cisco A9K-MOD80-TR ASR 9000 Mod80 Modular Line Card
CISCO CATALYST 3850 48 PORT FULL POE W/ 5 AP LICENSE IP BASE EN
Cisco N7K-M202CF-22L Nexus 7000 M2 Series 2 Port CFP 100 Gigabit Ethernet GbE KK
New Cisco Systems N7K-M148GS-11L | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems AIR-CT5760-HA-K9
Cisco Systems 15454E-CE-100T-8
Cisco Systems CTI-TCS-5RP-K9
Cisco Systems 15454-SMR2-LIC
Cisco Systems 4-10GE-ITU/C | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems 15454-40-MUX-C
Cisco Systems N7K-M148GS-11
!BRAND NEW IN BOX ! CISCO WS-C4500X-F-32SFP+ Gigabit SFP Switch ! SHIP FAST !
New CISCO WS-C4506E-S7L+96V+ | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems WS-C3750X-48U-S
Cisco Systems CTI-TCS-5RP-K9 | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems 4-10GE-ITU/C | incl 19% VAT | 2 years Cybertrading warranty
CISCO - WS-X6848-SFP-2T - Catalyst 6500 48-port GigE: 80G Sys ( Req. SFPs) Spare
Cisco ME-3800X-24FS-M / price w/o VAT 7142€
Cisco UCS5108 + 8x B200 M2 Blade Servers 16x SIX-CORE 2.40GHz 384Gb RAM,10Gb VIC
Cisco A9K-MOD80-TR Expansion module 1YearWarranty 2+Available
Cisco WS-C4506-E WS-X45-SUP6L-E 2x WS-X4448-GB-SFP WE CAN CUSTOMIZE 4U
CISCO 7606-S w/ 2x RSP720-3CXL-GE, 2x PWR-2700-AC CISCO7606-S - 3YR Warranty
Cisco UCSC-C240-M3S Dual P/S 10x 300GB 6Gb SAS, Xeon E5-2667v2, 64GB (8GB) DDR3
Cisco UCSB-B200-M3 192GB (16GB) 2x Intel E5-2667 v2/130W
Cisco UCSC-C240-M4S w/ dual P/S 2x 1TB SAS 7.2K RPM, E5-2630L, 8x 4GB DDR3
Cisco A9K-16T/8-B Cisco ASR 9000 Series Ethernet Line Cards
4x NEW Cisco WS-C2960XR-48FPS-I 48 10/100/1000 Ethernet Interfaces Port Switch
CISCO ASR1002X-5G-K9 ASR1002-X, 5G, K9, AES LICENSE NOB 3 Year Warranty
*Brand NEW* CISCO WS-C3850-48U-E Stackable 48 10/100/1000 ports + C3850-NM-2-10G
*** we buy Cisco WS-C3750X-24S-E **** (Brand New) (MO)
*Brand NEW* CISCO WS-C3850-48T-E 48 ports Switch + C3850-NM-2-10G Module
CISCO - WS-C3850-48P-E - Cisco Catalyst 3850 48 Port PoE IP Service
Cisco UCSB-B200-M3 384GB, 2x Intel 2.60GHz E5-2630v2/80W, 2x 300GB 6Gb SAS 15K
NEW Cisco WS-C3850-48U-S 3850-48U Layer 3 Switch Catalyst 3850 48 Port UPOE IP
New CISCO L-ASA5555-IPS-SSP | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems C4500E-LB-ES | incl 19% VAT | 2 years Cybertrading warranty
*New sealed& Neu OVP* CISCO VS-S2T-10G 2Years Wnty/VATfree €7100
New Cisco Systems AIR-CT5508-50-K9 incl 19% VAT // 2 years IT4Trade warranty
We buy Cisco *** WS-C3850-48U-E *** 3850
NEW SEALED Cisco ASA5520-AIP10-K8 Firewall Edition Bundle 1YearWaranty 2+Avlble
Cisco A9K-16T/8-B 16 port 10GE Medium Queue Line Card ASR 9006 9010 Series
CISCO ACE30-MOD-16-K9 ACE30-MOD-K9 Catalyst Application Control Engine
New Cisco Systems L-C4500E-LB-ES | incl 19% VAT | 2 years Cybertrading warranty
New CISCO CISCO3925-HSEC+/K9 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Cisco7204VXR/200 | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems WS-C4506E-S7L+96V+
New Cisco WS-C4507R+E Cisco Catalyst E-Series 4507R+E switch (7-slot chassis)
NEW Sealed Cisco WS-C3850-16XS-E 16 SFP+ Ethernet Ports 350 W AC *SMARTNETABLE*
WS-C6506-E 8700W P/S 2x VS-S720-10G-3C 2x WS-X6704-10GE 2x WS-X6748-SFP
Cisco WS-C6504-E Dual P/S 2x VS-S720-10G-3C 1x WS-X6748-GE-TX 1x WS-X6716-10G-3C
Cisco Nexus N7K-C7010-BUN 7010 Bundle Switch 1YearWarranty 2+Available
CISCO VS-S720-10G-3CXL= 6500 Supervisor 720 with 2 ports 10GbE MSFC3 PFC3CXL
Cisco Systems 15454-10E-L1-54.1
Cisco Systems 15454-10E-L1-58.1
CISCO WS-C3650-48PQ-E | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems 12816-CSC | incl 19% VAT | 2 years Cybertrading warranty
CISCO WS-SVC-WISM2HA-K9 | incl 19% VAT | 2 years Cybertrading warranty
CISCO WS-6509-EXL-FWM-K9 | incl 19% VAT | 2 years Cybertrading warranty [WS
Cisco Systems 10000-2P2-2DC-122
NEW Sealed Cisco WS-C3850-48F-E 48 10/100/1000 Ethernet PoE+ ports Switch
Cisco Systems ASR1000-ESP40
Cisco 12810/800-DC Router Chassis 12000/10-DC-PEM GSR10-ALRM 12810-SFC 12810E
Cisco Systems WS-C4506E-S7L+96V+
CISCO WS-C3650-48PQ-E | incl 19% VAT | 2 years Cybertrading warranty
New CISCO MCS-7845-I3-CCX1 | incl 19% VAT | 2 years Cybertrading warranty [MCS-7
New CISCO MCS7845-I3-CTRS-K9 | incl 19% VAT | 2 years Cybertrading warranty [MCS
New CISCO MCS-7845-I3-CTRS | incl 19% VAT | 2 years Cybertrading warranty [MCS-7
New CISCO MCS7845I3-K9-CMD2 | incl 19% VAT | 2 years Cybertrading warranty [MCS7
New CISCO MCS7845I3-K9-CXA1 | incl 19% VAT | 2 years Cybertrading warranty [MCS7
New CISCO WS-C4500X-F-16SFP+ | incl 19% VAT | 2 years Cybertrading warranty
NEW CISCO N5K-C5020P-BF Nexus 5000 2RU Chassis w/ N5K-PAC-1200W Power
CISCO WS-C6506-E w/ FAN, 1x VS-S2T-10G, 2x WS-CAC-6000W - 3YR Warranty
CISCO WS-C6509-E w/ FAN, 1x VS-S2T-10G, 2x WS-CAC-6000W - 3YR Warranty
*New* Cisco WS-F6K-DFC4-EXL Distributed Forwarding Card for Supervisor
*New* Cisco ASR1000-ESP40 ASR 1000 Embedded Services Processor 40Gbps
New Cisco Nexus 9300 w/ 48p 1/10G-T and 6p 40G QSFP+ N9K-C9372TX Clean Serial
CISCO3945E/K9 Cisco 3945 Router with 4 onboard GE IP Base w/ EVM-HD-8FXS/DID
Cisco DS-C9148D-4G32P-K9 Switch 32 ports 1YearWarranty 2+Available
NEW SEALED Cisco ASA5510-CSC20-K9 ASA 5510 Anti-X Edition 1YearWaranty 2+Avlble
CISCO7606-S w/ Dual Power 2x WS-SUP720-3BXL, 2x WS-X6748, 1xWS-X6704,1x WS-X6724
Cisco UCSB-B200-M3 128GB, 2x Intel E5-2667 v2, 2x 600GB 6Gb SAS
NEW Cisco WS-C3850-24S-E 24 SFP Ethernet ports Switch with 350WAC power supply
*Brand NEW* CISCO WS-C3850-48F-E Switch with warranty FAST SHIPMENT **WARRANTY**
CISCO - ISR4451-UCSE-S/K9 - Cisco ISR 4451 CI Bundle w 24 port SM, UCS-E Single
Cisco A9K-8T-E Cisco 8-Port 10GE High Queue Line Card
**New RETAIL Sealed* Cisco WS-C3850-24S-E Stackable 24 SFP Ethernet ports Switch
NEW Sealed Cisco WS-C3650-48FD-E 48 10/100/1000 3650 Series Ethernet PoE+ Switch
CISCO WS-C6503E-S32-10GE | incl 19% VAT | 2 years Cybertrading warranty
New CISCO WS-SVC-NAM-2-250S | incl 19% VAT | 2 years Cybertrading warranty
CISCO - WS-C4900M - Base system with 8 X2 ports and 2 half slots