Avaya 120A4 CSU Module (Channel Service Unit)
- In combination with a DS1 circuit pack, it provides the essential functions of external CSUs
- Small size, easier to install than external CSU
- Does not require any option switch settings or DS1 cable
- Vintage 2 and higher provide enhancements to support the payload loopback function available when the ESF framing format is selected (requires 700A loopback jack)
- The Avaya 120A4 CSU Module is compatible with the following DS1 circuit packs:
- TN464E to TN464HP
- TN2464CP and earlier
- TN767D or TN767E
- TN2313 or TN2313AP
- Supported on Definity, Multivantage, and Communication Manager servers that support TN circuit packs
- These items have been refurbished
- Refurbished items have been cleaned, tested, and confirmed to be fully functional
- These items may have minor blemishes on their housings which cannot be removed during the refurbishing process
No Hassle Return Policy & PC Certified Guarantee
Rest assured, if you order the wrong items, don't like the model, or just don't need it anymore we accept returns with NO restocking fees. Whether you want something different or just a credit, we have you covered! This policy goes hand in hand with our company culture of delivering outstanding customer satisfaction.
If you need assistance finding a different product our awesome staff is ready to help. Contact us for expert support.
- Item(s) must be returned within 30 days from invoice date.
- Item(s) must be received in original condition preferably in the same packing materials.
- Item(s) should be securely packed for safe return.
- The purchaser is responsible for all shipping costs and insurance.
- Products usually ship within two business days after payment. If you have a rush order, or need an item delivered on Saturday please call to request faster shipping.
- All products are shipped and delivered on business days.
- Fixed or free shipping offer does not apply to items shipped on pallets, please call for rates on those items. Free shipping offers only apply to the continental US.