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Model: CISCO3945/K9 Cisco 3945 Router 3900 Series ISR G2
Detail: Cisco 3945 Router w/SPE150(3GE,4EHWIC,4DSP,4SM,256MBCF,1GBDRAM,IPB)
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Overview (CISCO3945/K9)

The Cisco 3945 router, modular Services Performance Engine (SPE) 150, which can be upgraded for even higher performance as next-generation WAN environments evolve.

Quick Specs

Figure 1 shows the appearance of the CISCO3945/K9.


Table 1 shows the Quick Specs of the CISCO3945/K9.

Product Code


Services Performance Engine module

w/SPE 150

Rack Units



3 integrated 10/100/1000 Ethernet ports with 2 ports capable of RJ-45 or SFP connectivity

Expansion Slot(s)

4 service module slots

1 Internal Services Module slot

4 onboard digital signal processor (DSP) slots

4 Enhanced High-Speed WAN Interface Card (EHWIC) slots


1 GB (installed) / 2 GB (max)

Flash Memory

256 MB (installed) / 8 GB (max)


47.6 cm x 43.8 cm x 13.3 cm

Package Weight

21.84 Kg

Product Details

Figure 2 shows the front panel of the Cisco 3945 router.

CISCO3945/K9 Front Panel


① On/Off switch ② Power connector ③ LEDs area

Table 2 shows the LEDs area description.



SYS status LED

Solid green

Solid green indicates normal operation.

Blinking green

System is booting or is in ROM monitor mode.


System error.


Power is off or system board is faulty.

ACT status LED

Solid or blinking green

Solid or blinking indicates packet activity between the forwarding and routing engine and any I/O port.


No packet transfers are occurring.



IP phone power is on.


IP phone power is not on.

PS1 / PS2


System is running.


System is not running.

Figure 3 shows the back panel of the Cisco router 3945/K9 with LEDs.

CISCO3945/K9 Back LED


① Compact flash 0 and 1 (0, right) ② ISM ③ PVDM3 0,1,2 and 3 (0, far right) ④ EN (Enable USB console)

⑤ EN (Enable RJ-45 console)⑥ SFP S ⑦ SFP EN ⑧ S (Speed) ⑨ L (Link)

Table 3 shows the description of these LEDs on the back panel.





CompactFlash 1


Flash memory is busy.

Back Panel


Initialized with error.

Blinking Green then turns off

CompactFlash is ready for removal.

CompactFlash 0


Flash memory is busy.

Back Panel


Initialized with error.

Blinking Green then turns off

CompactFlash is ready for removal.

S (Speed)

1 blink + pause

GE port operating at 10 Mb/s.

Back Panel

2 blink + pause

GE port operating at 100 Mb/s.

3 blink + pause

GE port operating at 1000 Mb/s.

L (Link)


GE link is established.

Back Panel


No GE link is established.

EN (RJ-45 console port)


The RJ-45 console port is active.

Back Panel

EN (USB serial console port)


The USB console port is active.

Back Panel




Back Panel


Initialized with error.


Not installed.

PVDM3 0,1,2 and 3


PVDM is initialized.

Back Panel


PVDM is detected but not initialized.


No PVDM installed.


Blinking green

Blinking frequency indicates port speed.

Back Panel



Not present.

Back Panel


Present and enabled.


Present with failure.

Figure 4 shows the back panel of the Cisco 3945 router with slots and ports.

CISCO3945/K9 Back Slot


① Compact flash 0 and 1 (0, right) ② EHWIC 0,1,2 and 3 (0, far right) ③USB serial port ④RJ-45 serial console port ⑤AUX port ⑥ SFP 1 and SFP 2 (2, top)

⑦ 10/100/1000 Ethernet port GE 0/1 and GE 0/2 (GE 0/1, down) ⑧ 10/100/1000 Ethernet port GE 0/0 ⑨ USB 0 and USB 1 (1,top) ⑩ Ground ⑪ Service module slots

Figure 5 shows the SPE area and you can upgrade these slots and ports directly by one SPE module.

The Cisco 3900 Series offers field-replaceable SPEs which allow you to protect your initial investment in the Cisco 3900 platform for a longer time period and scale router performance as your network and branch-office needs grow.

CISCO3945/K9 SPE Module

Figure 6 shows the internal view of the CISCO3945/K9.

CISCO3945/K9 Internal View


The Cisco 3945 router supports two memory slots which has been installed two 512MB memory cards. When upgrading the memory, the same capacity of memory cards must be inserted into the two memory slots in the same time. It doesn't support to use only a single memory slot.

Modules and Licenses

Table 4 shows modules and licenses for this router.




Cisco Services Performance Engine 150 for Cisco 3945 ISR. (It's a configured item in the CISCO3945/K9.)


Enhanced EtherSwitch Service Module, L2/L3 switching, 16* 10/100/1000 GE ports, Enhanced POE, Cisco EnergyWise technology


Enhanced EtherSwitch Service Module, L2/L3 switching, 24 * 10/100/1000 GE ports, Enhanced POE, Cisco EnergyWise technology


Cisco Voice/WAN Card VWIC3-2MFT-G703


2-Port Serial WAN Interface Card Cisco Router High-Speed WAN Interface card


Cisco 1900, 2900, 3900 Router EHWIC WAN Card EHWIC-1GE-SFP-CU


Four port 10/100/1000 Base-TX Gigabit Ethernet switch interface card for Cisco 1900 2900 3900 Routers


Internal Services Module (ISM) with Services Ready Engine


16-channel high-density voice DSP module


256MB to 1GB Compact Flash Upgrade for Cisco 1900,2900,3900


256MB to 2GB Compact Flash Upgrade for Cisco 1900,2900,3900


256MB to 512MB CF Upgrade for Cisco 1900,2900,3900 ISR


256MB to 4GB Compact Flash Upgrade for Cisco 1900,2900,3900


1GB USB Flash Token




Cisco 3900 License L-FL-39-HSEC-K9 U.S. Export Restriction Compliance license for 3900 series


Cisco 3900 Router License - FL-39-SNA= SNA E-Delivery License for Cisco 3925/3945 for Cisco 3900 Series


Cisco Application Experience License ISR 3900 series - includes licenses for: AppX, DATA and WAASX.


Cisco 3900 License L-SL-39-SEC-K9 Security E-Delivery PAK for Cisco 3900 Series


Cisco 3900 License L-SL-39-UC-K9 Unified Communication E-Delivery PAK for Cisco 3900 Series

Datasheet Download

Cisco Router 3900 Series Datasheet.pdf

Get More Information

Do you have any question about the Cisco 3945/K9 router?

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Specification (CISCO3945/K9)

CISCO3945/K9 Specification

Manufacturer Cisco Systems, Inc
Manufacturer Part Number CISCO3945/K9
Product Type Router
Form Factor Desktop - modular - 3U
Connectivity Technology Wired
Data Link Protocol Ethernet, Fast Ethernet, Gigabit Ethernet
Capacity Cisco Unified Communications Manager Express sessions : 350
Cisco Unified SRST sessions : 1200
Network / Transport Protocol IPSec, PPPoE, L2TPv3
Routing Protocol

OSPF, IS-IS, BGP, EIGRP, DVMRP, PIM-SM, IGMPv3, GRE, PIM-SSM, static IPv4 routing, static IPv6 routing, policy-based

routing (PBR)

Remote Management Protocol SNMP, RMON
Encryption Algorithm SSL

Firewall protection, VPN support, MPLS support, Syslog support, content filtering, IPv6 support, Class-Based Weighted

Fair Queuing (CBWFQ), Weighted Random Early Detection (WRED), Quality of Service (QoS), Dynamic Multipoint VPN


Compliant Standards IEEE 802.3, IEEE 802.1Q, IEEE 802.1ah, IEEE 802.1ag
DRAM Memory 1 GB (installed) / 2 GB (max)
Flash Memory 256 MB (installed) / 8 GB (max)
LED Status Lights Indicators Link activity, power
Connectivity Slots
Router Interfaces 3 x 10Base-T/100Base-TX/1000Base-T - RJ-45
Management : 1 x console - RJ-45
Management : 1 x console - mini-USB Type B
Serial : 1 x auxiliary - RJ-45
Hi-Speed USB : 2 x 4 PIN USB Type A
2 x SFP (mini-GBIC)
Expansion Slots Total (Free) 4 ( 4 ) x EHWIC
4 ( 4 ) x PVDM
2 ( 1 ) x CompactFlash Card
1 ( 1 ) x Expansion Slot
4 ( 4 ) x service module (SM)
Power Supply
Power Device Power supply - internal
Voltage Required AC 120/230 V ( 47/63 Hz )
Dimensions / Weight / Miscellaneous
Width 47.6 cm ( 18.74 in)
Depth 43.8 cm ( 17.24 in)
Height 13.3 cm (5.24 in)
Package Weight 21.84 kg ( 48.15 lbs)
Weight 17.7 kg ( 39.02 lbs)
Compliant Standards

CISPR 22 Class A, CISPR 24, EN55024, EN55022 Class A, EN50082-1, AS/NZS 60950-1, AS/NZ 3548 Class A,

CAN/CSA-E60065-00,ICES-003 Class A, CS-03, FCC CFR47 Part 15, EN300-386, UL 60950-1, IEC 60950-1,

EN 60950-1, CSA C22.2 No. 60065, BSMI CNS 13438

System Software
IOS Software Included Cisco IOS IP Base

SMARTnet Support Quick Guide

Cisco SMARTnet Overview - Cisco SMARTnet Service Codes - Cisco SMARTnet Types
Cisco SMARTnet F.A.Q

CISCO3945/K9 SMARTnet Service Tool

Product Name Detail Price
CON-3SNT-3945 3YR SNTC 8X5XNBD Cisco 3945 w/SPE150 Inquiry
CON-3SNTP-3945 3YR SNTC 24X7X4 Cisco 3945 w/SPE150 Inquiry
CON-3OSP-3945 3YR SNTC 24X7X4OS Cisco 3945 w/SPE150 Inquiry
CON-SNT-3945 SNTC-8X5XNBD Cisco 3945 w/SPE150 Inquiry
CON-SNTE-3945 SNTC-8X5X4 Cisco 3945 w/SPE150 Inquiry
CON-SNTP-3945 SNTC-24X7X4 Cisco 3945 w/SPE150 Inquiry
CON-OS-3945 SNTC-8X5XNBDOS Cisco 3945 w/SPE150 Inquiry
CON-OSE-3945 SNTC-8X5X4OS Cisco 3945 w/SPE150 Inquiry
CON-OSP-3945 SNTC-24X7X4OS Cisco 3945 w/SPE150 Inquiry
CON-ECMU-3945 SWSS UPGRADES Cisco 3945 w/SPE150(3GE.4EHWIC.4DSP.4SM.256MBC Inquiry
CON-NCD2-3945 CMB SVC 24X7X2 NCD2 Cisco 3945 w/SPE150 Inquiry
CON-NCD2P-3945 CMBSV 24X7X2OS NCD2P Cisco 3945 w/SPE150 Inquiry
CON-NCD4P-3945 CMBSV 24X7X4OS NCD4P Cisco 3945 w/SPE150 Inquiry
CON-NCD4S-3945 CMB SV 8X5X4OS NCD4S Cisco 3945 w/SPE150 Inquiry
CON-NCDAU-3945 CMB SVC SAU NCDAU Cisco 3945 w/SPE150 Inquiry
CON-NCDCS-3945 CBSV 8X5XNBDOS NCDCS Cisco 3945 w/SPE150 Inquiry
CON-NCDE-3945 CMB SVC 8X5X4 NCDE Cisco 3945 w/SPE150 Inquiry
CON-NCDP-3945 CMB SVC 24X7X4 NCDP Cisco 3945 w/SPE150 Inquiry
CON-NCDS1-3945 CMBSVC 8X5XNBD NCDS1 Cisco 3945 w/SPE150 Inquiry
CON-NCDS3-3945 CMB SVC 24X7X4 NCDS3 Cisco 3945 w/SPE150 Inquiry
CON-NCDSO-3945 CMBSV 24X7X4OS NCDSO Cisco 3945 w/SPE150 Inquiry
CON-NCDT-3945 CMBSVC 8X5XNBD NCDT Cisco 3945 w/SPE150 Inquiry
CON-NCDW-3945 CMB SPT SVC SW NCDW Cisco 3945 w/SPE150 Inquiry
CON-NCF2-3945 CMB SVC 24X7X2 Cisco 3945 w/SPE150 Inquiry
CON-NCF2P-3945 CMB SVC 24X7X2OS Cisco 3945 w/SPE150 Inquiry
CON-NCF4P-3945 CMB SVC 24X7X4OS Cisco 3945 w/SPE150 Inquiry
CON-NCF4S-3945 CMB SVC 8X5X4OS Cisco 3945 w/SPE150 Inquiry
CON-NCFAU-3945 CMB SVC SAU + UPGR Cisco 3945 w/SPE150 Inquiry
CON-NCFCS-3945 CMB SVC 8X5XNBDOS Cisco 3945 w/SPE150 Inquiry
CON-NCFE-3945 CMB SVC 8X5X4 Cisco 3945 w/SPE150 Inquiry
CON-NCFP-3945 CMB SVC 24X7X4 Cisco 3945 w/SPE150 Inquiry
CON-NCFS1-3945 CMB SVC SU1 8X5XNBD Cisco 3945 w/SPE150 Inquiry
CON-NCFS3-3945 CMB SVC SU3 24X7X4 Cisco 3945 w/SPE150 Inquiry
CON-NCFSO-3945 CMBSVC SUO3 24X7X4OS Cisco 3945 w/SPE150 Inquiry
CON-NCFT-3945 CMB SVC 8X5XNBD Cisco 3945 w/SPE150 Inquiry
CON-NCFW-3945 CMB SVC SW Cisco 3945 w/SPE150 Inquiry
CON-NCH2-3945 CMB SVC 24X7X2 NCH2 Cisco 3945 w/SPE150 Inquiry
CON-NCH2P-3945 CMBSV 24X7X2OS NCH2P Cisco 3945 w/SPE150 Inquiry
CON-NCH4P-3945 CMBSV 24X7X4OS NCH4P Cisco 3945 w/SPE150 Inquiry
CON-NCH4S-3945 CMB SV 8X5X4OS NCH4S Cisco 3945 w/SPE150 Inquiry
CON-NCHAU-3945 CMB SVC SAU NCHAU Cisco 3945 w/SPE150 Inquiry
CON-NCHCS-3945 CBSV 8X5XNBDOS NCHCS Cisco 3945 w/SPE150 Inquiry
CON-NCHE-3945 CMB SVC 8X5X4 NCHE Cisco 3945 w/SPE150 Inquiry
CON-NCHP-3945 CMB SVC 24X7X4 NCHP Cisco 3945 w/SPE150 Inquiry
CON-NCHT-3945 CMBSVC 8X5XNBD NCHT Cisco 3945 w/SPE150 Inquiry
CON-NCHW-3945 CMB SPT SVC SW NCHW Cisco 3945 w/SPE150 Inquiry
CON-NCJ2-3945 CMB SVC 24X7X2 NCJ2 Cisco 3945 w/SPE150 Inquiry
CON-NCJ2P-3945 CMBSV 24X7X2OS NCJ2P Cisco 3945 w/SPE150 Inquiry
CON-NCJ4S-3945 CMB SV 8X5X4OS NCJ4S Cisco 3945 w/SPE150 Inquiry
CON-NCJAU-3945 CMB SVC SAU NCJAU Cisco 3945 w/SPE150 Inquiry
CON-NCJCS-3945 CBSV 8X5XNBDOS NCJCS Cisco 3945 w/SPE150 Inquiry
CON-NCJE-3945 CMB SVC 8X5X4 NCJE Cisco 3945 w/SPE150 Inquiry
CON-NCJT-3945 CMBSVC 8X5XNBD NCJT Cisco 3945 w/SPE150 Inquiry
CON-NCJW-3945 CMB SPT SVC SW NCJW Cisco 3945 w/SPE150 Inquiry
CON-PREM-3945 SNTC-24X7X2OS Cisco 3945 w/SPE150 Inquiry
CON-S2P-3945 SNTC-24X7X2 Cisco 3945 w/SPE150 Inquiry
CON-SAU-3945 SW APP SUPP + UPGR Cisco 3945 w/SPE150 Inquiry
CON-SU1-3945 IPS SVC. AR NBD Cisco 3945 w/SPE150 Inquiry
CON-SU2-3945 IPS SVC. AR 8X5X4 Cisco 3945 w/SPE150 Inquiry
CON-SU3-3945 IPS SVC. AR 24X7X4 Cisco 3945 w/SPE150 Inquiry
CON-SU4-3945 IPS SVC. AR 24X7X2 Cisco 3945 w/SPE150 Inquiry
CON-SUO1-3945 IPS SVC. ONSITE NBD Cisco 3945 w/SPE150 Inquiry
CON-SUO2-3945 IPS SVC.ONSITE 8X5X4 Cisco 3945 w/SPE150 Inquiry
CON-SUO3-3945 IPS SVC.ONSITE24X7X4 Cisco 3945 w/SPE150 Inquiry
CON-SUO4-3945 IPS SVC.ONSITE24X7X2 Cisco 3945 w/SPE150 Inquiry
CON-SW-3945 SMARTNET NO RMA Cisco 3945 w/SPE150 Inquiry

Faq (CISCO3945/K9)

I need to buy a router series 3900 model 3945 / k9 doubt is further if I have to buy software CME, E1 card is also recommened.

If you need CME, you should buy License FL-CME-SRST. As for E1 Card, HWIC-1CE1T1-PRI is the most basic module.

I want to limit bandwidth on one of my 3945 router interface can you share which is best option to do this?

You can do this in one of two ways. - Traffic Shaping: is predominantly for egress traffic -(Usually comes into play on your routers when your physical wan lines exceeds the your traffic rate set by the ISP or your neighboring site) - Traffic Policing: is used for ingress traffic (usually originating from you LAN,-entering first device in network from being overrun with too much traffic)

On the Cisco ISR G2 routers with the SEC-K9 license, what tunnel count and performance throughput are available?

The SEC-K9 permanent licenses apply to the Cisco 1900, 2900, and 3900 ISR G2 platforms; these licenses limit all encrypted tunnel counts to 225 tunnels maximum for IP Security (IPsec), Secure Sockets Layer VPN (SSL VPN), a secure time-division multiplexing (TDM) gateway, and secure Cisco Unified Border Element (CUBE) and 1000 tunnels for Transport Layer Security (TLS) sessions. The SEC-K9 license limits encrypted throughput to less than or equal to 85-Mbps unidirectional traffic in or out of the ISR G2 router, with a bidirectional total of 170 Mbps. This requirement applies for the Cisco 1900, 2900, and 3900 ISR G2 platforms.

What is the exact HSEC-k9 license?

The HSEC-K9 license removes the curtailment enforced by the U.S. government export restrictions on the encrypted tunnel count and encrypted throughput. HSEC-K9 is available only on the Cisco 2921, Cisco 2951, Cisco 3925, Cisco 3945, Cisco 3925E, and Cisco 3945E. With the HSEC-K9 license, the ISRG2 router can go over the curtailment limit of 225 tunnels maximum for IP Security (IPsec) and encrypted throughput of 85-Mbps unidirectional traffic in or out of the ISR G2 router, with a bidirectional total of 170 Mbps. The Cisco 1941, 2901, and 2911 already have maximum encryption capacities within export limits.

What countries are classified license-free zones?

Countries belonging to the EU license-free zone include Australia, Austria, Belgium, Bulgaria, Canada, Cypress, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Japan, Latvia, Lithuania, Luxembourg, Malta, Netherlands, New Zealand, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom, and the United States.

What is the Cisco Services Performance Engine (SPE)?

The Cisco Services Performance Engine is the modular motherboard for the Cisco 3900 Series routers primarily responsible for the processing and forwarding of traffic. Similar to today's Cisco 3845 motherboard, the SPE houses the PVDM slots, ISM slot, and the EHWIC slots in addition to the system memory. The SPE provides a modular approach to system upgradability such that you can upgrade Cisco 3900 Series routers deployed in the field with new performance and capabilities with a simple SPE swap. This form of investment protection helps ensure that routers deployed today will be upgradable for years to come with the latest innovations without the need for complete platform replacement.

What power-supply options are available on the CISCO3945/K9 router?

The table lists the part numbers of the available power supplies for CISCO3945/K9.

AC option


AC + PoE option


DC option11


Redundant power supply


What is PoE boost?

When a Cisco 2900 is connected to an external RPS device or a Cisco 3900 is configured with a second power supply, these routers can be configured in PoE boost mode. This mode takes advantage of the increased power capacity of the second power source to power additional PoE devices beyond what a single power source could drive.

Can I reuse my existing PVDM2 DSP modules in the CISCO3945/K9?

Yes. You can install PVDM2s on the motherboard PVDM slots using the PVDM adaptor cards (PVDM2-ADPTR). You can also insert the high-density voice network modules (NM-HDV2s) with PVDM2s into the service-module slots of the Cisco 3900 Series routers by using the network module-to-service module adapter card (SM-NM-ADAPTR).

 What capacity increases can I expect for collaboration applications on the CISCO3945/K9 platforms?

Capacity increases vary across the different collaboration applications. Please refer to the applicable data sheet for specific information.

Shipping & Payment


Cargo will be delivered within 1 day after payment arrived. Tracking Number will be offered once delivery done.

Delivery OptionsEstimated Delivery Time
DHL 2-4 business days
Fedex 2-4 business days
Hong Kong EMS 5-10 business days
Hong Kong Air Parcel 10-20 business days
By Sea 10-20 business days


Above mentioned information are just for your reference only,we will keep you posted for the tracking delivery schedule.There are two delivery options available for by air and by sea:

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Customer Reviews

4.9 5
4.9 (10 reviews)
5 Stars
4 Stars
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Share your thoughts with other customers?

Posted on 8/20/2016
Verified Buyer
meets my requirement

This model meets my requirement perfectly. And the service is good here.

Posted on 8/18/2016
Verified Buyer
Quality assured

You will pay for it. I wont lie but when you pay for Cisco you also pay for peace of mind knowing that they are insanely tested, quality assured, and guaranteed to work no matter what.

Posted on 6/26/2016
Verified Buyer
Best router

All in all I am very satisfied, this was without a doubt the best router at the pricepoint and was a great investment.

Posted on 4/22/2016
Verified Buyer
Important device

Our IT department is in a process of upgrading systems throughout the City. This is an important device, critical tour operations.

Posted on 3/14/2016
Verified Buyer

This router is hot now, it can be upgraded for even higher performance as next-generation WAN environments evolve.

Posted on 2/13/2016
Verified Buyer
Excellent price

This is an excellent price. We bought a couple and are using them for remote branch offices.

Posted on 9/23/2014
Verified Buyer
Good device

I received the router last week but it took me a long time to install and deploy it. Actually I bought this router for my ccie exam because I need it to make some tests. Its quality is no problem, but the deployment is difficult for me.

Posted on 4/20/2014
Verified Buyer
Cisco 3945 k9

Cisco is always a solid performer in the router arena. This Cisco 3945/k9 router is a good middle business router

Posted on 9/26/2013
Verified Buyer

flexible router for small business offices and large enterprise office, cost-effective. fast and free shipping. enjoy shopping Cisco items here.

Posted on 8/1/2013
Verified Buyer
CISCO3945-SEC/K9 review

I chose 10 Cisco 3945 routers. but i\'m in trouble when paying, i paying and paying and paying for many times, calling and calling…then succeed last. Can it be easier, it really annoy me, but thanks for the good device and your patience.

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