Interfaces Modules Network Equipment : Cisco NM-1T3/E3


Cisco NM-1T3-E3
放大图片Cisco NM-1T3-E3

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The Cisco T3/E3 Network Module provides high-speed WAN access for the Cisco 2600, 3600, 3700 Multiservice Access router as well as the Cisco 3800 and 3900 Series Integrated Services Routers. The NM-1T3/E3 network module offers both Service Providers and Enterprise customer's unprecedented flexibility in provisioning clear-channel T3 or E3 connections.

Cisco's Packet-over-T3/E3 network module for the Cisco Integrated Services Routers series offers the first software-configurable T3/E3 product from Cisco. This flexible network module allows the customer to switch between T3 and E3 applications with a single Cisco IOS command. This feature provides customers increased flexibility and investment protection by allowing a Cisco Partner, service provider or enterprise customer to stock only a single product that can be deployed internationally.
The increased demand for bandwidth over the WAN and more attractive pricing of T3/E3 links by SPs has led to steady growth in T3/E3 deployments around the world. The Packet-over T3/E3 network module (part number NM-1T3/E3) eliminates the need for an external data service unit (DSU), reduces provisioning costs, and provides highly manageable T3/E3 line termination. The module provides an integrated line interface unit (LIU) DSU that allows T3 or E3 lines to be directly terminated on a Cisco router, eliminating the need for external DSU equipment. This simplifies the T3/E3 line management, reduces provisioning cost, and frees up valuable rack space.
The Cisco T3/E3 network modules provide support for the proprietary subrate and scrambling features of T3 DSU vendors such as Digital Link, Larscom, and ADC Kentrox. Subrate support in the Cisco T3/E3 Network Module maximizes the utility of these products in service provider environments By simultaneously supporting interoperability with a wide range of third-party DSU vendors, this network module offers the flexibility to support installed equipment without locking customers into a proprietary solution.
The Cisco T3/E3 Network Module provides direct connectivity to a T3 line for full-duplex communications at the T3 rate of 44.736 MHz and full-duplex E3 communications at 34.368 MHz. Each T3 or E3 port consists of a pair of 75-ohm BNC coaxial connectors (Type RG-59), one for transmit data and one for receive data, along with six LED indicators for line status. The Cisco T3/E3 Network Module is supported in all Cisco IOS feature sets, and there are no additional memory requirements.

Key Benefits
The combination of T3 and E3 options in a single network module provides the following key customer benefits:
Physical space savings: Eliminates the need for external DSU device, saving valuable rack space
Simplified management: Eliminates the need for two separate monitoring tools
Software-configurable T3/E3: Provides the flexibility to deploy a single module worldwide

Key Features

One-port T3 with DSU or E3 with DSU network module
T3/E3-specific features for monitoring, bit error rate tester (BERT), Management Information Bases (MIBs), alarms, and more
Ability to independently or simultaneously enable scrambling and subrate in each DSU mode; support for the following DSU vendors' algorithms: Digital Link, Kentrox, Larscom, Verilink, Adtran.
Support for the serial encapsulation protocols: Frame Relay, Point-to-Point Protocol (PPP), High-Level Data Link Control (HDLC)
16-bit cyclic redundancy check (CRC)

Key Management Features

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)
  • 制造商: Cisco
  • 模型: NM-1T3/E3