Cart0 item(s) - $0.00 0

  • Your shopping cart is empty!

0

Nortel NTN551AA Access Node Express Voice Module

Nortel NTN551AA Access Node Express Voice Module
Nortel NTN551AA Access Node Express Voice Module
The Nortel NTN551AA Access Node Express Voice Module is a high-performance voice processing card designed for integration into Nortel ExpressNode platforms. Engineered to deliver crystal-clear audio and reliable call handling, this module enables ser... Read More
price
$166.95
  • In Stock: 1
  • Manufacturer: Nortel
  • Model or Part: NTN551AA
  • Condition: Refurbished
  • Weight: 25.00lb
Add to Cart
Buy Now
Add to Wish List

United States Shipping
Orders over $200 qualify for Free Super-Saver Shipping! We ship at our discretion via the most cost-effective method using FedEx, UPS, or USPS.

To ensure your order is processed efficiently, all shipping charges must be pre-paid at checkout. We are unable to bill directly to third-party shipper accounts or use customer-provided labels for domestic shipments.
International Shipping
International orders begin processing as soon as payment is confirmed.

  • Pre-paid Shipping: For your convenience, you can select and pay for international shipping directly at checkout.
  • Carrier Accounts: Alternatively, we can bill transport costs directly to your FedEx account number. (Note: We cannot bill to DHL, TNT, or UPS accounts).
  • Customer Labels: We are also happy to ship internationally using pre-paid labels provided by you for any carrier.
Expedited and Rush Shipping
Need it faster? HardwareJet.com offers 1 or 2-day expedited shipping options during checkout for eligible items.

To get your order to the front of the line, expedited orders include a small rush fee in addition to the carrier's shipping charges. If an item is not available for expedited shipping, these options will not appear in your cart.

Item Condition

New - Sealed or Open Box Condition
Excellent - Almost-New, Missing Original Packaging
Refurbished - Seller Refurbished, Good Condition, Previously Used Item

To bring you an even wider selection, some of our items are shipped directly from our trusted partners. Delivery times may vary for these items.
3-Port Switched Ethernet Expansion Module 6511 - High Performance RJ45 Network Switch
Quickview
3-Port Switched Ethernet Expansion Module 6511 - High Performance RJ45 Network Switch
$43.95
Add to Cart Add to Wish List
Catalyst 5000, Supervisory with NF
Quickview
Catalyst 5000, Supervisory with NF
$314.95
Add to Cart Add to Wish List
3-Meter 10GBase-CU SFP+ Direct Attach Cable - 30 AWG 100 Ohm Passive M/M
Quickview
3-Meter 10GBase-CU SFP+ Direct Attach Cable - 30 AWG 100 Ohm Passive M/M
$72.95
Add to Cart Add to Wish List
Fibre Channel Host Bus Adapter 10GbE PCIe 2-Port CNA Optical Converged Network Adapter SFP+
Quickview
Fibre Channel Host Bus Adapter 10GbE PCIe 2-Port CNA Optical Converged Network Adapter SFP+
$609.95
Add to Cart Add to Wish List
Net Shelter CX Bolt Down Kit
Quickview
Net Shelter CX Bolt Down Kit
$609.95
Add to Cart Add to Wish List
1GB SDRAM RAM Memory Module
Quickview
1GB SDRAM RAM Memory Module
$147.95
Add to Cart Add to Wish List
HP Procurve 5300XL Series 4-Port 100/1000-T XL TX Switch Expansion Module
Quickview
HP Procurve 5300XL Series 4-Port 100/1000-T XL TX Switch Expansion Module
$29.95
Add to Cart Add to Wish List
8-Port GE Fiber / Copper Xpim Cpnt for SRX550 650
Quickview
8-Port GE Fiber / Copper Xpim Cpnt for SRX550 650
$109.95
Add to Cart Add to Wish List

Overview
The Nortel NTN551AA Access Node Express Voice Module is a high-performance voice processing card designed for integration into Nortel ExpressNode platforms. Engineered to deliver crystal-clear audio and reliable call handling, this module enables service providers and enterprises to expand voice capacity while maintaining low latency and high availability.

Key Features

  • Supports up to 96 simultaneous voice channels per module
  • Full-duplex PCM voice encoding with 8-bit A-law or mu-law support
  • Hot-swap capability for zero-downtime upgrades
  • Built-in echo cancellation and gain control for superior audio quality
  • Compact 3U rack-mount form factor for efficient space utilization
  • Compatible with Nortel ExpressNode 2000, 3000 and 4000 series

Technical Specifications

  • Interface: V.35 or RS-232 serial control
  • Power consumption: 45 watts maximum
  • Operating temperature: 0 deg to 55 deg C (32 deg to 131 deg F)
  • Dimensions: 17.5 inches height x 9.5 inches width x 1.75 inches depth
  • Supported signaling: ISDN PRI, SS7, and SIP trunking
  • Reliability: Mean time between failures (MTBF) greater than 200,000 hours

Applications
The NTN551AA is ideal for:

  • Telecom carriers expanding local or regional voice services
  • Corporate PBX environments requiring scalable voice capacity
  • Call centers that need high-quality audio for customer interactions
  • Hosted VoIP providers integrating traditional PSTN access with IP networks
  • Government or education networks that demand robust, secure voice infrastructure

By adding the Nortel Access Node Express Voice Module, customers can future-proof their networks, improve call clarity, and reduce operational costs through streamlined hardware management.