Avaya Dual Loop Buffer Card – Refurbished QPC659D | Reliable Synchronization for Meridian Systems
CONDITION: RE-MADE IN THE USA™ Refurbished
Part Number: QPC659D
Out of stock
FREE Ground Shipping on qualifying orders over $250. International and oversized/bulk items are excluded.
Orders typically ship same day
For Quantity Discounts or Expedited Shipping
Call: 800-895-9660 or
Email: sales@retrotel.com
Product Description
Avaya Dual Loop Buffer Card – Refurbished QPC659D is a mission-critical interface module designed for Avaya (formerly Nortel) Meridian Option systems, providing reliable buffering and synchronization between network and control components. The QPC659D version is an enhanced iteration of the QPC659 series, engineered to deliver higher stability, faster data handling, and improved redundancy in complex PBX environments.
This Dual Loop Buffer Card supports primary and secondary loop configurations, maintaining seamless communication even in the event of a single-loop failure—ensuring continuous operation for enterprise-grade telephony. It handles timing, message verification, and signal integrity across system modules, making it an essential component for large-scale Meridian installations.
Each card is professionally refurbished, tested, cleaned, and certified to meet OEM specifications—providing exceptional reliability and cost savings for legacy system maintenance or upgrades.
Features
-
Avaya Dual Loop Buffer Card – Refurbished QPC659D
-
Compatible with Avaya/Nortel Meridian Option 11C, 61C, and 81C PBX systems
-
Manages message buffering, synchronization, and timing between control loops
-
Supports dual-loop redundancy for high system availability
-
Provides stable communication across network and control modules
-
Fully tested under load and verified for electrical integrity
-
Professionally refurbished to OEM quality standards
Q & A Section
Q: What does the Avaya QPC659D Dual Loop Buffer Card do?
A: It manages data buffering, synchronization, and fault tolerance between PBX control and network modules in Avaya Meridian systems.
Q: Which systems is the QPC659D compatible with?
A: It’s compatible with Avaya/Nortel Meridian Option 11C, 61C, and 81C PBX platforms.
Q: What’s the difference between QPC659B and QPC659D?
A: The QPC659D is a later revision offering enhanced buffering performance, improved reliability, and better system fault handling.
Q: Is this unit refurbished or new?
A: This listing is for a professionally refurbished card, tested and certified to OEM standards.
Q: Does it require any firmware updates?
A: No. The QPC659D functions with existing Meridian firmware and system configurations.