รายละเอียด Cisco IP Phone CP-7811-K9 Standard Warranty 90 Days **สามารถสั่งซื้อเพิ่มได้** Features ● Session Initiation Protocol (SIP) Codec support ● G.711a/μ, G.722, G.729a, iLBC Key call features support ● Dialing (E.164) ● Abbreviated dial ● Adjustable ringing and volume levels ● Adjustable display contrast ● Agent greeting ● Auto-answer ● Auto-detection of headset (Not available on the IP Phone 7811) ● Busy Lamp Field (BLF) (Not available on the IP Phone 7811)
