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CISCO NM-1T3/E3 Switching Module
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Switching Module

Cisco 1-port clear-channel T3/E3 network module (Spare)

UNSPSC: 43201404

NSN: 5998015081477

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Cisco Switching Module - For Switching Network - 1 x T3/E3 WAN44.74 Mbit/s

The Cisco T3/E3 Network Module provides high-speed WAN access for the Cisco 2600, 3600, and 3700 series routers. T3/E3 WAN access enables the network to carry high volumes of data and rich multimedia content, while providing low latency for voice over IP (VoIP).

General Information
Cisco Systems, Inc
Manufacturer Part Number
Manufacturer Website Address
Brand Name
Product Name
Switching Module
Product Type
Switching Module
Technical Information
Switching Network
Interfaces/Ports Details
1 x BNC Female T3/E3 Network Full-duplex WAN
Media & Performance
Media Type Supported
Network Technology
Maximum Data Transfer Rate
44.74 Mbit/s
Physical Characteristics
Additional Information
  • DSX3 level interface with dual female 75-ohm BNC coaxial connectors per port (separate RX and TX)
  • Scrambling and subrate support of major DSU vendors
  • Line build-out - Programmable for up to 450 feet of 734A or equivalent coaxial cable or up to 225 feet for 728A or equivalent coaxial cable
  • C-bit, or M23 framing for T3, bypass and G.751 framing for E3 (software selectable)
  • Binary 3-zero substitution (B3ZS) (T3) or high-density bipolar with three zeros (HDB3) (E3) line coding
  • Support for 16- and 32-bit CRC (16-bit default)
  • DS3 FEAC channel support
  • Twenty-four-hour history maintained for error statistics and failure counts
  • DS3 alarm and event detection (once per second polling)
  • Alarm indication signal (AIS)
  • Out of frame (OOF)
  • Line code violation (LCV)
  • Excessive zeros (EXZ)
  • Far-end receive failure (FERF)
  • Line and payload loopback capabilities
  • DS3 remote-line loopback (via Far End Alarm and Control [FEAC] codes per American National Standards Institute [ANSI] T1.107a)
  • Response to embedded loopback commands
  • Insertion of loopback commands into transmitted signal
  • Programmable pseudorandom pattern up to 32 bits long, including 223, 220, 215, 1s, 0s, alt-0-1
  • 32-bit error count and bit-count registers
  • Alarm detection - Alarm indication signal (AIS), remote alarm, far-end block error (FEBE), out of frame (OOF)
  • Onboard processor for Maintenance Data Link (MDL)
  • Physical space savings - Eliminates the need for external DSU device, saving valuable rack space
  • Software-configurable T3/E3 - Provides the flexibility to deploy a single module worldwide

    Serial Encapsulations:
  • HDLC
  • PPP
  • Frame Relay
  • ATM Data Exchange Interface (ATM-DXI)
Supported Platforms & Minimum IOS Versions:
  • 3745 - 12.2(11)YT
  • 3725 - 12.2(11)YT
  • 3660 series - 12.2(11)YT
  • 3640 - Not Available
  • 3620 - Not Available
  • 2691 - 12.2(11)YT
  • 2650 - Not Available
  • 2600XM Series - 12.2(11)YT
  • 2600 series - Not Available
  • 1720 - Not Available
  • 1600 series - Not Available