8 Ports Asynchronous/synchronous serial network module for the Cisco 3600 series provides flexible dial support, with each port configurable in synchronous or asynchronous mode, offering mixed-media dial support in a single chassis. In a typical WAN aggregation application, the Cisco 3640 platform can support up to 24 low-speed (up to 128 kbps) synchronous or asynchronous (up to 115.2 kbps) serial lines. Availability: Usually ships the same business day. Cisco Asynchronous/Synchronous serial network router module NM-8A/S NM-8A/S$1,598.00 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.