Avaya 847749017 DEFINITY PBX Expansion Card

Avaya 847749017 DEFINITY PBX Expansion Card Image 1

Avaya 847749017 TN754C 4-Wire Digital Line circuit pack for DEFINITY and G3 PBX systems.

The Avaya 847749017 is a TN754C 4-Wire Digital Line circuit pack designed to provide digital trunk connectivity for legacy Avaya communication systems. This card supports 4-wire digital line interfaces, enabling connections to digital transmission facilities and tie trunk applications.

The TN754C is engineered for use within Avaya DEFINITY and G3 series PBX systems, where it provides essential digital trunk capacity for inter-system networking and external carrier connections. It supports standard 4-wire digital signalling protocols commonly used in enterprise telephony environments.

This is a legacy circuit pack associated with Avaya’s classic DEFINITY platform, which has been superseded by newer communication solutions. However, many organisations continue to operate these systems, creating ongoing demand for replacement and expansion cards to maintain existing infrastructure.

Available from Tech Star as new or refurbished stock. Submit a price enquiry for availability and lead time.

From the same manufacturer

Compatible with the same platform

Frequently asked questions

Is the Avaya 847749017 refurbished or new?
Tech-Star supplies both new and refurbished Avaya 847749017. Refurbished items are tested and graded against manufacturer specifications; the condition is confirmed at quote.
What warranty is included with the Avaya 847749017?
Refurbished Avaya 847749017 comes with a 90-day parts and labour warranty as standard. Extended warranty options are available on request.
How do I get a price for the Avaya 847749017?
Pricing reflects current stock and lead time, so we quote per enquiry. Submit the part number through the contact form for a quote, typically within one business hour.
Can the Avaya 847749017 be returned?
Returns are accepted within 14 days of delivery in line with our return policy. A restocking fee may apply for opened items.
How quickly can the Avaya 847749017 be delivered?
Lead time depends on current stock. UK-based items typically ship the next business day; sourced items vary. We confirm lead time at quote.

Key Features4-wire digital line interface; Digital trunk connectivity; Tie trunk support; Slot-based circuit pack design
ApplicationsDigital trunk connectivity; Inter-PBX networking; Tie trunk applications; Legacy DEFINITY system maintenance
CompatibilityAvaya DEFINITY systems; Avaya G3 series PBX
Specifications4-wire digital interface; Circuit pack form factor
PlatformDEFINITY
ManufacturerAvaya

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