Cisco Catalyst C1000-48T-4G-L 48-Port Managed Data Switch, 4x1G SFP
The Cisco Catalyst C1000-48T-4G-L is a 48-port Layer 2 managed switch with 4x 1G SFP uplinks. It supports Single IP Management for up to eight switches in a single stack.
Overview
The Cisco Catalyst 1000 Series is Cisco's line of fixed managed enterprise-class Layer 2 switches for small business and branch networks, running Cisco IOS with both a command-line interface and an on-box web UI so they can be deployed out of the wiring closet and into IoT-heavy sites. The C1000-48T-4G-L is the 48-port data-only configuration with four fixed 1G SFP uplinks, giving high port density in a single rack unit. Its 1G SFP uplinks aggregate access traffic back to the distribution layer over fiber or copper. With data-only ports it targets sites connecting non-powered endpoints, leaving PoE budgeting to a separate powered switch where needed. As a Gigabit Ethernet model it supports Cisco Single IP Management for administering up to eight switches under one IP address, along with Cisco IOS capabilities such as AutoConfig for touchless provisioning and Bluetooth-based local console access.
Technical Details
The Cisco Catalyst C1000-48T-4G-L is a Layer 2 managed 1U rackmount access switch with 48 Gigabit Ethernet (10/100/1000) data ports and four fixed 1G SFP uplinks, running Cisco IOS. Switching capacity is 104 Gbps and forwarding rate is 77.38 Mpps. It carries no Power over Ethernet, so all 48 access ports are data-only. It provides high-density wired access-layer connectivity for non-powered endpoints such as desktops, printers, and wired IoT devices in small business and branch wiring closets.
Enterprise Network
Corporate Campus
Branch Office
Best For
The Cisco Catalyst C1000-48T-4G-L suits small business and branch wiring closets that need high-density wired connectivity for non-powered endpoints such as desktops, printers, and wired IoT devices, aggregated over 1-Gigabit fiber or copper uplinks to the distribution layer. It runs a single fixed Cisco IOS Layer 2 feature set with no license tiers to select, and its four 1G SFP uplinks provide flexible fiber or copper aggregation from the access layer.
Not suitable if:
- you need 10G uplinks, since this model has fixed 1G SFP uplinks
- you need to power devices such as wireless access points, IP phones, or IP cameras, since this is a data-only switch with no Power over Ethernet
- you need Layer 3 routing between VLANs or dynamic routing protocols, since the Catalyst 1000 is a Layer 2-only switch
- you need multigigabit (mGig) access ports, since all access ports run at 10/100/1000
C1000-48T-4G-L Specifications
| Class & Licensing | |
|---|---|
| License Tier | None |
| License Detail / MTBF | None; MTBF 1,452,667 hours |
| Ports & Uplinks | |
| Port Speed | Gigabit |
| Uplink Configuration | 4x 1G SFP |
| Performance & Scale | |
| Stacking | No |
| Switching Capacity | 104 Gbps |
| Forwarding Rate | 77.38 Mpps |
| MAC Table | 16,000 |
| Hardware & Memory | |
| DRAM | 512 MB |
| Flash | 256 MB |
| Power & Thermal | |
| Power Input / PSU | 110-220V AC (auto-sensing); single fixed power supply, 50 to 60 Hz |
| Redundant PSU | No |
| Cooling | Fan-cooled |
| Physical & Environmental | |
| Dimensions (H x W x D) | 1.73 x 17.48 x 11.34 in |
| Weight | 8.71 lbs (3.95 kg) |
| Operating Temperature | Sea level -5 to 50°C; Up to 5,000 ft (1500 m) -5 to 45°C; Up to 10,000 ft (3000 m) -5 to 40°C |
| Operating System | Cisco IOS |
Part Number Decode
- C1000 — C1000 is the platform prefix, identifying the Cisco Catalyst 1000 Series Gigabit Ethernet model.
- 48 — 48 is the port count, indicating 48 Gigabit Ethernet access ports.
- T — T is the port-type marker, indicating data-only ports with no Power over Ethernet.
- 4G — 4G is the uplink code, indicating four fixed 1G SFP uplinks.
- L — L is the standard model suffix Cisco uses across the Catalyst 1000 ordering line, and does not denote a selectable license tier.
C1000-48T-4G-L Accessories
| CAB-CONSOLE-RJ45 | Console Cable 6 Feet with RJ-45 |
| CAB-CONSOLE-USB | Console Cable 6 Feet with USB Type A and mini-B Connectors |
| PWR-CLP | Power Cable Restraining Clip |
| RCKMNT-1RU-2KX | Rackmount kit for 1 RU for C1000, 2960-X and 2960-XR (19/23/24/etsi) |
FAQ
Does the Cisco Catalyst C1000-48T-4G-L support PoE?
No. The Cisco Catalyst C1000-48T-4G-L is a data-only switch, and all 48 Gigabit Ethernet access ports carry no Power over Ethernet, so it cannot power devices such as wireless access points, IP phones, or IP cameras. If you need PoE+ on the access ports, the Cisco Catalyst C1000-48P-4G-L provides PoE+ on a partial power budget and the C1000-48FP-4G-L provides Full PoE+, both with the same four 1G SFP uplinks.
What transceivers do the uplinks on the C1000-48T-4G-L use?
The Cisco Catalyst C1000-48T-4G-L has four fixed 1G SFP uplink ports. These are 1-Gigabit SFP slots and do not accept 10G SFP+ optics. Specific transceiver compatibility should be verified against the manufacturer's transceiver compatibility matrix at tmgmatrix.cisco.com. Transceivers are sold separately.
Can the Cisco Catalyst C1000-48T-4G-L be stacked?
The Cisco Catalyst C1000-48T-4G-L does not support data-plane stacking; there is no shared switching fabric across units. As a Gigabit Ethernet model it does support Cisco Single IP Management, which lets up to eight Catalyst 1000 switches be connected through their uplink ports and managed under a single IP address. This is a management convenience for administering several switches together, not a high-bandwidth stacking backplane, so each switch forwards traffic independently.
What is the difference between the C1000-48T-4G-L and the C1000-48T-4X-L?
Both are 48-port data-only Gigabit Ethernet Layer 2 switches, and they differ in uplink speed. The C1000-48T-4G-L has four fixed 1G SFP uplinks and 104 Gbps of switching capacity, while the C1000-48T-4X-L has four fixed 10G SFP+ uplinks and 176 Gbps of switching capacity. Choose the C1000-48T-4X-L when the access layer needs 10-Gigabit fiber uplinks to the distribution layer.
Does the Cisco Catalyst C1000-48T-4G-L support Layer 3 routing?
No. The Cisco Catalyst C1000-48T-4G-L is a Layer 2 managed switch and does not provide dynamic Layer 3 routing. It runs Cisco IOS with Layer 2 features such as VLANs, spanning tree, and quality of service, and it is designed for the access layer. Networks that need routing between VLANs or dynamic routing protocols should place a Layer 3 switch or router at the distribution layer.
Is the Cisco Catalyst C1000-48T-4G-L end of life?
Cisco has published an End-of-Sale and End-of-Life notice for the Cisco Catalyst 1000 Series. The last date for Cisco to accept new orders was April 30, 2025, and the Last Date of Support is April 30, 2030. Network Devices Inc. sells new, factory-sealed Catalyst 1000 units from inventory, and Cisco support continues under active service contracts through the Last Date of Support. The C1000-48T-4G-L remains fully supportable for deployments planned within that window.
What condition is the C1000-48T-4G-L sold in, and what warranty applies?
The Cisco Catalyst C1000-48T-4G-L is sold new and factory-sealed. It is covered by a Network Devices Inc. one-year warranty and a 30-day return policy.
