Aastra M5212 Meridian Digital Centrex Terminal (NT4X39-03) - with Automatic Call Distribution (ACD) telephone is ideal in situations where agents must handle a large number of calls quickly. Because of its easy-to-use features and extensive supervisor monitoring capabilities, the M5212 helps enhance agent performance and productivity. Ideal for Call Centers to handle a Large Number of Calls Quickly. Dual Headset Capability. Compatible with DMS-100 ACD Software. 2-Line x 24-Character LCD Display Screen. 11 Programmable Line / Feature Keys. Compatible with M536 & M518 Add-On Modules. Redial Button. Hold Key. Volume Control. Call Fowarding. Conference Calling. Auto Dial.