DSU/CSU for 4-wire dedicated 56K or 64K applications. Provides a V.35 DTE interface, set-up by dip switches. For synchronous communications only. Availability: Usually ships the next business day. Adtran DSU 56/64 v.35 DSU/CSU 1200062L1 1200062L1$237.00 For data sheet click here Call us if you have any questions about online store at 201-843-9363 x7025 or email * SHIPPING RATE INFORMATION: Press the "Order" Button, then press "Checkout" and enter your Shipping Address. The system will then calculate the shipping cost. You will always see a calculated total on our site before final checkout. When you see this total you will have the options to send order, cancel order, or go back and change options. The system calculation is not always correct. Therefore, we reserve the right to review the shipping cost, but if a change is needed, we will not ship until we receive confirmation from you.