| (Model # SN-ULTRA-DA) Note: Picture may not represent the actual product. We are continuously working on improving our website and reserve the right to change specifications and availability without prior notice. For use behind Avaya, Nortel, or Siemens phone systems. Instead of using an analog port, the digital adapter makes the EnGenius base literally share the same extension as your desk phone and adds functionality. Supports 1 line only. 1 SN-ULTRA-DA is required for each line. Used with both SN920, EP-490 & DuraFon bases. | 
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