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C1121-4PLTEP – 4 LAN – 2 WAN (1 SFP combo) – Integrated Services Routers
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C1121-4PLTEP Description
The Cisco C1121-4PLTEP Integrated Services Router extends the capabilities of the ISR 1000 Series by adding pluggable LTE connectivity, making it ideal for branches that require flexible WAN options. Equipped with 4 Gigabit LAN ports, dual Gigabit WAN uplinks, and LTE support for primary or backup WAN connectivity, this router delivers secure, high-performance networking. With SD-WAN support, advanced VPN, and optional PoE, the C1121-4PLTEP is designed to provide enterprise-grade connectivity for remote offices, retail stores, and distributed enterprises.
Product Highlights
C1121-4PLTEP Rear Panel

|
1 4112_394c60-e4> |
Reset button 4112_6d35b5-b5> |
2 4112_de4e5f-dd> |
Power switch 4112_2ab26c-14> |
|
3 4112_a0d2e6-59> |
4-pin power connector 4112_8c1db2-7d> |
4 4112_2da007-0b> |
Ethernet switch 4112_e42240-64> |
|
5 4112_c834dc-6a> |
GE 0/0/1 4112_3d4229-eb> |
6 4112_ab1739-e2> |
GE WAN 0/0/0 -RJ45 4112_433480-7d> |
|
7 4112_ced50b-7a> |
GE WAN 0/0/0 -SFP 4112_4d86bc-d8> |
8 4112_8e47f4-c4> |
Micro-USB console 4112_e77a40-c8> |
|
9 4112_43ae81-b4> |
USB 3.0 4112_3af7f4-a3> |
10 4112_76d000-64> |
Pluggable 4112_b972f1-0b> |
|
11 4112_2051d8-1f> |
Kensington lock slot 4112_6c9972-81> |
12 4112_680a52-64> |
Grounding 4112_72e707-28> |
Quick Specs
|
Parameter 4112_1893cd-54> |
Details 4112_2b3e24-0c> |
|---|---|
|
Product Model 4112_339a05-ab> |
Cisco C1121-4PLTEP 4112_2ca012-ea> |
|
Series 4112_115bc4-bc> |
Cisco ISR 1000 Series 4112_6635d9-aa> |
|
LAN Ports 4112_3f9062-6e> |
4 × Gigabit Ethernet 4112_0657f0-9f> |
|
WAN Ports 4112_0c2590-d3> |
2 × Gigabit Ethernet (1 RJ-45 + 1 combo RJ-45/SFP) 4112_a87601-fd> |
|
LTE Support 4112_53d6cc-6b> |
Integrated pluggable LTE (CAT4 / CAT6 support) 4112_32dc80-b9> |
|
Performance 4112_510a81-b9> |
Up to 370 Mbps IPsec throughput 4112_6dd686-01> |
|
DRAM / Flash 4112_53e110-b5> |
4 GB / 4 GB 4112_569a91-1d> |
|
Console Ports 4112_30a6f8-33> |
Micro-USB 4112_b84702-9e> |
|
Power Supply 4112_65ec9d-cb> |
115W AC adapter for PoE (standard 66W optional) 4112_67e633-ca> |
|
PoE Support 4112_1b9e76-b5> |
Optional (2 PoE / 1 PoE+) 4112_a938d2-dd> |
|
Dimensions (H×W×D) 4112_9915d2-c8> |
1.65 × 10.80 × 7.85 in 4112_8a7e95-3f> |
|
Weight 4112_0cd2da-38> |
3.70 lb (1.68 kg) 4112_3ba8a2-3e> |
|
Minimum IOS XE Version 4112_cc13dc-5f> |
17.2.1 4112_0817c3-c6> |
Key Features
Built-in support for pluggable LTE modules (CAT4, CAT6, and CAT18) ensures reliable WAN access, making it ideal for primary or backup Internet connections in branch deployments.
Delivers up to 370 Mbps IPsec VPN throughput, supporting secure branch networking with advanced firewall, QoS, and segmentation features on Cisco IOS XE.
Equipped with 2 Gigabit WAN ports (RJ-45 + combo SFP) for wired and fiber connectivity, ensuring WAN redundancy and flexibility in hybrid network environments.
Optional 115W AC power supply supports 2 PoE or 1 PoE+ ports, allowing direct powering of IP phones, cameras, and wireless access points without additional equipment.
Native Cisco SD-WAN support enables centralized orchestration, dynamic path selection, and cloud optimization, reducing operational complexity for distributed enterprises.
A space-saving chassis (1.65 × 10.80 × 7.85 in) designed for SMBs and branch offices, with modular LTE support ensuring long-term adaptability and investment protection.
Applications Scenarios
Reliable LTE failover for continuous point-of-sale and application uptime.
Secure VPN and redundant WAN for compliance and mission-critical services.
Ensures high availability with dual WAN + LTE for hybrid WAN deployments.
Product Comparison
|
Parameter 4112_de9df4-c7> |
C1121-4PLTEP 4112_a477ad-0b> | 4112_a3272c-59> |
C1121X-8PLTEPW 4112_2574e9-68> |
|---|---|---|---|
|
Series 4112_1db53e-4d> |
ISR 1000 4112_232686-28> |
ISR 1000 4112_7621e0-9a> |
ISR 1000 4112_7c2368-c9> |
|
LAN Ports 4112_31f821-3b> |
4 × GE 4112_e9d828-57> |
4 × GE 4112_87f4d2-80> |
8 × GE 4112_a4ad6d-bc> |
|
WAN Ports 4112_00835e-ca> |
2 × GE (1 RJ-45 + 1 combo SFP) 4112_87255c-a8> |
2 × GE (1 RJ-45 + 1 combo SFP) 4112_6f4460-87> |
2 × GE (RJ-45 + SFP) 4112_ce89b7-2f> |
|
LTE Support 4112_e609af-b4> |
Yes (Pluggable CAT4/CAT6) 4112_17f116-f0> |
No 4112_f4b04e-90> |
Yes (LTE + Wi-Fi) 4112_192c07-ef> |
|
Wi-Fi Support 4112_9c7963-36> |
No 4112_d9d721-06> |
No 4112_939db1-81> |
Yes (802.11ac Wave 2) 4112_dcf3e9-17> |
|
PoE Options 4112_56b5f0-3d> |
Optional (2 PoE/1 PoE+) 4112_f86649-0d> |
Optional (2 PoE/1 PoE+) 4112_70b9f1-1f> |
Optional (4 PoE/2 PoE+) 4112_6d29a4-6d> |
|
DRAM / Flash 4112_0b5e5d-7b> |
4 GB / 4 GB 4112_11052e-e8> |
4 GB / 4 GB 4112_3dde1b-ec> |
8 GB / 8 GB 4112_ea4a55-26> |
|
Max Encrypted Throughput 4112_669675-58> |
370 Mbps 4112_66931d-94> |
370 Mbps 4112_e2a6ce-0d> |
465 Mbps 4112_4d2f18-52> |
|
Console Ports 4112_48e5c5-56> |
Micro-USB 4112_d2912c-f1> |
Micro-USB 4112_c3b848-06> |
Micro-USB 4112_34d834-3c> |
|
Weight 4112_30aed7-03> |
1.68 kg 4112_d54b8b-22> |
1.55 kg 4112_d33817-b4> |
2.10 kg 4112_4e1826-02> |
|
Dimensions (H×W×D) 4112_78af30-e6> |
1.65 × 10.80 × 7.85 in 4112_7f5369-b7> |
1.65 × 10.80 × 7.85 in 4112_44f00b-13> |
1.65 × 12.70 × 8.90 in 4112_567700-5c> |
|
Min. IOS XE Version 4112_4008a8-f2> |
17.2.1 4112_79b8f1-20> |
17.2.1 4112_8e7b1a-b0> |
17.2.1 4112_083eb1-e4> |
Specifications
| Parameter | Details |
|---|---|
| Product Model | C1121-4PLTEP |
| Series | Cisco ISR 1000 Series |
| LAN Ports | 4 × Gigabit Ethernet (RJ-45) |
| WAN Ports | 2 × Gigabit Ethernet (1 RJ-45 + 1 combo SFP) |
| LTE Support | Pluggable LTE module (CAT4, CAT6, CAT7, CAT18 options) |
| Performance | 370 Mbps IPsec throughput (IMIX) |
| SD-WAN IPsec Throughput | 338 Mbps (IMIX) |
| Console Ports | Micro-USB |
| DRAM / Flash | 4 GB / 4 GB |
| Dimensions (H × W × D) | 1.65 × 10.80 × 7.85 in |
| Weight | 3.70 lb (1.68 kg) |
| Operating Temperature | 0° to 40°C |
| Power Supply | 115W AC (required for PoE); 66W standard option |
| PoE Support | Optional 2 × PoE or 1 × PoE+ |
| Minimum IOS XE Version | 17.2.1 |
| Compliance | UL, EN, IEC, FCC Class B |
Get More Information
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Quality Certifications
Customer Reviews
Questions & Answers
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What does C1121-4PLTEP include out of the box?
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C1121-4PLTEP vs C1121-4P—what changes?
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Can LTE be used as the only WAN?
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What about SIM management and carriers?
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How do I place antennas effectively?
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How many devices can I power?
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Which security features should I enable?
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Can it join an SD-WAN fabric later?
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Great signal reception. Genuine Cisco hardware. Arrived safely.
Comms are critical. This unit delivers. Vendor is reliable.
LTE backup is a must for our temp sites. SIM slots work perfectly. Fast shipping.
Good experience. Helped us confirm the LTE bands were correct for our region.