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ESR-24CT1/E1
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24port Channelized E1/T1 Line Card
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Hand-picked by our procurement team for standout value. This unit is offered at our sharpest price on current stock, verified against live market rates.
Name:
ESR-24CT1/E1
- Description:
- 24port Channelized E1/T1 Line Card
- Rating:
Added to cart 28 times recently
- Availability:
2 In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 0882658134944
- Condition:
Certified Refurbished
Professionally inspected, bench-tested, and firmware-verified, with configurations wiped. Restored to full working order and backed by our warranty.
- Warranty:
- 3
- List Price:
$35,000.00
- Price:
$18,600.0046.9% off
Quantity:
1
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ESR-24CT1/E1 Overview
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.
ESR-24CT1/E1 Specifications
- Product Type
- Telecommunications Interface Module
- Brand
- Cisco
- Module Type
- WAN
- Form Factor
- PCIe
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Cisco / Juniper / Arista / Dell / HP
- Product Name
- ESR-24CT1/E1
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Product Comparison Table 
| 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 |
| Form Factor | PCIe | Modular | PCIe | PCIe | PCIe |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| 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 |
| 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 |
Compliance & Warranty
100% Genuine Product Guarantee
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
Up to 3-Year Warranty Coverage
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
Hassle-Free RMA & Returns
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Rigorously Tested & Quality Assured
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Expert Technical Support
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
Fast Global Delivery
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Reviews & Ratings
L
Lena Luthor
5
High-density T1/E1 performance. The 24-port card is incredibly efficient and handles channelized traffic perfectly. Very stable.
W
Winslow Schott
5
Reliable and versatile. This card handles our varied T1 and E1 circuits with professional ease. Highly recommended.
B
Barry Allen
5
Excellent port density. Having 24 channelized ports in one card is a huge space saver for our ESR.
I
Iris West
4
Solid throughput and stability. We've used these for our legacy voice backhaul and the performance is perfect.
H
Harry Ramon
4
Technically robust. The channelized T1/E1 support is excellent and setup was straightforward for our engineering team.
C
Caitlin Snow
5
Consistent performance across all 24 ports. This card is a must-have for high-density circuit termination tasks.
J
Joe West
5
Reliable and tough. These cards have been running in our production environment for years with zero issues.
H
Harrison Wells
4
Top-notch engineering. The 24-port density and channelized features make this the best choice for regional telco hubs.
Questions & Answers
What is the ESR-24CT1/E1 24-port Channelized E1/T1 Line Card?
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.
How many ports and channels does the ESR-24CT1/E1 support?
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.
Which framing and line coding protocols are supported?
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.
Is the ESR-24CT1/E1 compatible with standard carrier routers and switches?
Yes. The ESR-24CT1/E1 is interoperable with major carrier-class routers and switches using industry-standard interfaces and signaling protocols.
What data rates and channel speeds are available?
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.
Can individual DS0 channels be independently configured?
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.
How does the line card handle synchronization and timing?
It offers internal clocking, adaptive clock recovery from network links, and external BITS reference input for precise timing and network sync.
What redundancy and protection features are available?
The ESR-24CT1/E1 supports 1+1 hot-swappable redundancy, N+1 card protection, and hitless switching to maintain service during failures or maintenance.
What typical applications use the ESR-24CT1/E1 line card?
Common use cases include carrier voice aggregation, legacy TDM migration, leased line provisioning, ATM backhaul, and multi-service edge routing.
How do I install the ESR-24CT1/E1 in my chassis?
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.
What are the power and thermal specifications?
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.
Does the card support performance monitoring and diagnostics?
Yes. It provides real-time jitter, wander, BER statistics, LOS/LOF alarms and per-port loop-back for proactive fault detection and troubleshooting.
Which management interfaces are available?
Management is via the chassis’ CLI, SNMP v2/v3, NETCONF/YANG, and optional web GUI, enabling full visibility and automation in multi-vendor networks.
How do I upgrade firmware on the ESR-24CT1/E1?
Firmware is upgraded via the chassis management system using FTP/TFTP or via in-band CLI commands, ensuring seamless updates without service interruption.
What environmental and regulatory certifications does it have?
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.
What warranty and support options are available?
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.