Avaya 846969954 Definity/Communication Manager PBX Expansion Card

Avaya 846969954 Definity/Communication Manager PBX Expansion Card Image 1

Avaya 846969954 TN556D 12-Port ISDN BRI trunk card for Definity/Communication Manager systems.

The Avaya TN556D (part number 846969954, also referenced as 108267097) is a 12-port ISDN Basic Rate Interface (BRI) trunk circuit pack designed for Avaya Definity and Communication Manager PBX systems. This card provides connectivity for ISDN BRI trunk lines, enabling digital voice and data transmission over the public switched telephone network.

The TN556D is installed in Definity G3 and Avaya S8xxx Communication Manager media gateways, providing essential ISDN connectivity for enterprise telephony environments. Each of the 12 ports supports a single BRI connection with two B-channels and one D-channel for signalling.

This is a legacy product from the Avaya Definity/Communication Manager product line. Whilst these systems remain operational in many enterprise environments, the TN556D is no longer in active production. It remains a viable option for maintaining existing ISDN infrastructure or expanding capacity on established Avaya platforms.

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 846969954 refurbished or new?
Tech-Star supplies both new and refurbished Avaya 846969954. Refurbished items are tested and graded against manufacturer specifications; the condition is confirmed at quote.
What warranty is included with the Avaya 846969954?
Refurbished Avaya 846969954 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 846969954?
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 846969954 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 846969954 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 Features12-port ISDN BRI capacity; Digital trunk connectivity; TDM circuit pack architecture; Hot-swappable design
ApplicationsEnterprise PBX ISDN connectivity; PSTN trunk integration; Legacy voice network maintenance
CompatibilityAvaya Definity G3 systems; Avaya Communication Manager; Avaya S8xxx Media Gateways
Specifications12 ISDN BRI ports; 2B+D per port configuration; TN-series circuit pack form factor
PlatformAvaya Definity/Communication Manager
ManufacturerAvaya

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