United StatesName:
Added to cart 28 times recently
In stock - Ready to Ship
$35,000.00
$18,600.0046.9% off
Quantity:
Business price:
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Shipping:
Payment:
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Need Additional Discount on Product?
Request a quote below - Get Exclusive Pricing and Support.
Shipping:
Payment:
ESR-24CT1/E1
24port Channelized E1/T1 Line Card
TRUSTED, TRIED, PROVEN
Inventory Delivered By
& Verified By
Solutions Powered By
ESR-24CT1/E1 is a high-performance telecommunications interface module engineered for modern network environments where legacy E1 connectivity meets contemporary digital infrastructure. This specialized WAN card offers 24 dedicated E1 channels in a compact form factor, delivering reliable signal integrity and streamlined data transmission for integration into routers, switches, and telecommunications systems.
Designed with easy installation in mind, the ESR-24CT1/E1 seamlessly fits into PCIe slots on servers and network platforms while supporting key digital communication standards. Its robust design and compatibility with leading industry vendors make it an ideal solution for expanding network capacity, modernizing legacy systems, and ensuring uninterrupted connectivity in demanding data center and telecom applications.
ESR-24CT1/E1 price is $18,600.00, a 46.9% saving from the Cisco list price of $35,000.00. ESR-24CT1/E1 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for ESR-24CT1/E1 for additional pricing. Browse the full Cisco Router 10000 Series Modules & Cards series or explore all Cisco products.
To get the detailed certification, please go to the Compliance Center.
| ESR-24CT1/E1 |  ESR-4OC3ATM-SM |  ESR-HH-1GE |  ESR-1COC12-SMI |  ESR-8E3/DS3 | |
|---|---|---|---|---|---|
| Compatibility | Cisco / Juniper / Arista / Dell / HP | Cisco, Juniper, Arista, Dell, HP | Cisco / Juniper / Arista / Dell / HP | Cisco, Juniper, Arista, Dell, HP | Cisco / Juniper / Arista / Dell / HP |
| Connector Type | N/A | Fiber LC | RJ-45 | SFP+ | RJ-45 |
| Data Rate | N/A | OC-3 (155Mbps) | 1Gbps | 10G | 44.736 Mbps |
| Depth | N/A | 0.5 inches | N/A | N/A | N/A |
| Expansion Slots | N/A | N/A | N/A | N/A | NIM |
| Form Factor | PCIe | Modular | PCIe | PCIe | PCIe |
| Height | N/A | 1.0 inches | N/A | N/A | N/A |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Interface Ports | N/A | Fiber | Ethernet | SFP+ | RJ-45 |
| Max Speed | N/A | 155Mbps | 1Gbps | 10Gbps | 44.736 Mbps |
| Module Type | WAN | WAN / ATM Module | Ethernet | SFP+ | WAN |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Power Consumption | N/A | 12W | N/A | 15W | 10W |
| Product Name | ESR-24CT1/E1 | ESR-4OC3ATM-SM | ESR-HH-1GE Ethernet Module | ESR-1COC12-SMI | ESR-8E3/DS3 |
| Product Type | Telecommunications Interface Module | Network Module | Network Module | Network Card | Network Module |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Supported Features | N/A | Auto-negotiation, Signal Integrity, Error Correction | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS | Auto-negotiation / Wake-on-LAN / Jumbo Frames / QoS |
| Supported Protocols | N/A | ATM, TCP/IP | TCP/IP | TCP/IP | TCP/IP |
| Weight | N/A | 0.8 lbs | N/A | N/A | N/A |
| Width | N/A | 3.5 inches | N/A | N/A | N/A |
High-density T1/E1 performance. The 24-port card is incredibly efficient and handles channelized traffic perfectly. Very stable.
Reliable and versatile. This card handles our varied T1 and E1 circuits with professional ease. Highly recommended.
Excellent port density. Having 24 channelized ports in one card is a huge space saver for our ESR.
Solid throughput and stability. We've used these for our legacy voice backhaul and the performance is perfect.
Technically robust. The channelized T1/E1 support is excellent and setup was straightforward for our engineering team.
Consistent performance across all 24 ports. This card is a must-have for high-density circuit termination tasks.
Reliable and tough. These cards have been running in our production environment for years with zero issues.
Top-notch engineering. The 24-port density and channelized features make this the best choice for regional telco hubs.
The ESR-24CT1/E1 is a high-density Channelized E1/T1 line card that delivers 24 fully channelized ports for voice, data and legacy TDM services in carrier-grade applications.
Each ESR-24CT1/E1 line card provides 24 physical ports and supports up to 24 × 32 channels (768 DS0s), fully channelized for granular bandwidth allocation.
The card supports E1 framing (G.703/G.704), T1 framing (D4/CAS/ESF) and line coding (HDB3 for E1, AMI/B8ZS for T1), ensuring universal carrier compatibility.
Yes. The ESR-24CT1/E1 is interoperable with major carrier-class routers and switches using industry-standard interfaces and signaling protocols.
Each E1 port delivers 2.048 Mbps and each T1 port delivers 1.544 Mbps, with per-DS0 routing at 64 kbps granularity for flexible bandwidth management.
Absolutely. The ESR-24CT1/E1 supports per-channel configuration for encapsulation, routing, and signaling, enabling mixed TDM, VoIP, and data services on a single card.
It offers internal clocking, adaptive clock recovery from network links, and external BITS reference input for precise timing and network sync.
The ESR-24CT1/E1 supports 1+1 hot-swappable redundancy, N+1 card protection, and hitless switching to maintain service during failures or maintenance.
Common use cases include carrier voice aggregation, legacy TDM migration, leased line provisioning, ATM backhaul, and multi-service edge routing.
Simply slide the hot-swappable card into an available slot, secure the front panel screws, and configure via the chassis management interface—no system downtime required.
Each card consumes up to 25 W under full load. It operates from –5 °C to 55 °C with front-to-rear airflow and follows NEBS Level 3 cooling guidelines.
Yes. It provides real-time jitter, wander, BER statistics, LOS/LOF alarms and per-port loop-back for proactive fault detection and troubleshooting.
Management is via the chassis’ CLI, SNMP v2/v3, NETCONF/YANG, and optional web GUI, enabling full visibility and automation in multi-vendor networks.
Firmware is upgraded via the chassis management system using FTP/TFTP or via in-band CLI commands, ensuring seamless updates without service interruption.
The line card is NEBS Level 3 certified, CE marked, RoHS compliant, and meets UL 60950 and FCC Part 15 standards for safe, eco-friendly deployment.
The ESR-24CT1/E1 includes a one-year hardware warranty, extended support plans, 24×7 technical assistance, and optional on-site spares and next-business-day replacement.