Supports T1 (24-channel) and E1 (32-channel) digital facilities
In ISDN-PRI applications, the ISDN D-channel connects to a TN778 packet control and the TN765 packet processor interface (R8 or later si) or the TN1655 packet interface (R8r or later) via the LAN bus
Has the same functionality as the TN464F, which is for US and Canada offers only
Test jack access to the T1/E1 line
Board level administrable A-Law and m-Law companding
CRC-4 generation and checking (E1 only)
Stratum 3 clock capability
Support for the 120A ICSU
Support for Conversant
CO, TIE, DID, OPS port types that use robbed-bit signaling protocol, proprietary bit-oriented signaling (BOS) 24th channel signaling protocol, or DMI-BOS 24th channel signaling protocol
Support for Russian incoming ANI
Refurbished
Functionality
Cosmetics
All refurbished items are restored to full functionality, and their grades reflect only cosmetic condition. Lower-grade products may have more visible blemishes but are rigorously tested and cleaned to ensure identical performance and warranty coverage.
PC Certified Guarantee
No-hassle returns. Zero restocking fees.
Wrong item? Changed your mind? Don't need it anymore? We've got you covered.
30-Day Returns
No restocking fees, ever
Refund or store credit — your choice
30 days from invoice date
Return in original condition, securely packed
Fast Shipping
Ships within 2 business days*
Rush & Saturday delivery available — call us
Free ground shipping available (continental US orders over $500)
Overnight delivery available
1-Year Warranty
Covers defects & functional failures
Normal business use, from date of purchase
Batteries: 90 days (consumable)
Excludes misuse, modification, mishandling
Need help finding the right product?
Our team is ready with expert support before and after your purchase.
*Shipping and delivery on business days. Purchaser is responsible for return shipping costs and insurance.
Free/fixed shipping offers exclude palletized items — call for freight rates.
Have shopped PCLiquidations for years, always a satisfying experience.
John E.
Verified
Great experience every time. I have gotten refurbished printers (for work) and a personal laptop. Outstanding value and quality product. I'll never buy new again!
Zach
Verified
Monitor was in excellent condition and shipping was fast. Extremely pleased with this purchase and would purchase from PCLiquidations again.
Sarah P.
Verified
PC Liquidations has the best customer service I've encountered in a long time. I recommend them for all your electronic needs.
Laura A.
Verified
I have ordered many times, you have a great refurbished product, and you stand behind it.
Michael C.
Verified
Outstanding, easy to use. Order arrived early, well packed, no damage. Startup and customozatin was smooth, I'm up and running!
Andy G.
Verified
Y'all have been one of my preferred vendors for years, plus I recommend you to clients and colleagues
Lee M.
Verified
Ordered refurbish office phones at a great price. Shipped quick and all phones are in good shape.
Jackie T.
Verified
It was no hassle. i got what I want and it came on time with zero issues.
Fabrice C.
Verified
Great Price and quality, wonderful service. used PCL many times, for my business
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888-654-3376
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