Grandstream Networks HT881 VoIP telephone adapter
Grandstream Networks HT881. Voice codecs: G.711, G.723.1, G.726, G.729A, G.729B, Fax compatibility: T.38, LED indicators: LAN, Power, WAN. Security algorithms: AES, HTTPS, SIPS, SSL/TLS. Width: 100 mm, Depth: 28 mm, Height: 190 mm
Features
Voice codecs: G.711, G.723.1, G.726, G.729A, G.729B
Fax compatibility: T.38
Feature: Reset button
LED indicators: LAN, Power, WAN
Network
Feature: Quality of Service (QoS) support
Call management
Feature: Caller ID
Feature: Conference call
Feature: Call waiting
Security
Security algorithms: AES, HTTPS, SIPS, SSL/TLS
Ports & interfaces
Ethernet LAN (RJ-45) ports: 2
Modem (RJ-11) ports: 8
Operational conditions
Operating temperature (T-T): 0 – 40 °C
Storage temperature (T-T): -10 – 60 °C
Operating relative humidity (H-H): 10 – 90%
Weight & dimensions
Width: 100 mm
Depth: 28 mm
Height: 190 mm
Dimensions (WxDxH): 120 x 180 x 36 mm
Weight: 460 g