Nortel Bus Terminator Assembly NT4R11AA ESBC Terminator – Refurbished
CONDITION: RE-MADE IN THE USA™ Refurbished
Part Number: NT4R11AA
$199.00
Availability: In stock
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Product Description
NT4R11AA ESBC Terminator (also referenced as ESBC Bus Terminator PCB Assembly) is a critical component used in legacy Nortel Meridian / Option PBX systems to properly terminate the ESBC (Extended Station Bus Card) communication loop.
When ESBC cards are installed in a system, the terminator ensures signal integrity and correct bus termination, helping prevent communication errors, ghost stations, module failures, or system instability.
Refurbished to OEM specifications, this NT4R11AA unit offers a cost-effective replacement for older bus terminator assemblies in legacy Nortel Option 11C/61C/81C systems.
✅ Features
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NT4R11AA ESBC Terminator – Refurbished
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Specifically designed for ESBC (Extended Station Bus Card) bus loops in Nortel Meridian/Option systems
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Ensures proper bus termination and signal integrity
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Helps maintain stability and avoid communication errors on the ESBC network
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Ideal replacement for older or faulty terminator modules
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Professionally refurbished, cleaned and tested for reliability
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Compatible with system upgrades or full module replacements
✅Q & A Section
Q: What does the NT4R11AA ESBC Terminator do?
A: It provides proper termination and signal integrity for the ESBC (Extended Station Bus Card) loop in Nortel Meridian/Option PBX systems, which helps maintain correct communications and prevents bus-errors.
Q: Which systems is it compatible with?
A: It is designed for legacy Nortel Meridian/Option 11C, 61C, 81C platforms using ESBC bus modules and HABC terminator cards. Chicago Tech, Inc.+1
Q: Why would I need a bus terminator card?
A: If station bus signals are not properly terminated, you may experience intermittent faults, station drops, unexplained resets, or module failures. This card helps prevent that.
Q: Is this unit new or refurbished?
A: This listing is for a refurbished NT4R11AA card, professionally cleaned and tested.
Q: Can I install it myself?
A: Yes — it installs into the appropriate slot in the system cabinet, typically where previous terminator modules were installed; power down the system before insertion for safety.