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Power Adapter for Yealink Phone T54W, T46U, MP54, MP56, T57W, T46S, T48U, T53W Power Supply for Yealink IP Phones SIP-T29G, T48S,T58A, T58-CAM, MP56 for Teams, PS5V2000US 5V 2A Charger Replacement 
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Yealink SIP- T31G Gigabit IP Phone with 2 Lines & HD voice- Brand: Yealink
- Part Number: SIP- T31G
- Type: VoIP Phones
- Security: NETWORK AND SECURITY
SIP v1 (RFC2543), v2 (RFC3261)
Call server redundancy supported
NAT traversal: STUN mode
Proxy mode and peer-to-peer SIP link mode
IP assignment: static/DHCP
HTTP/HTTPS web server
Time and date synchronization using SNTP
UDP/TCP/DNS-SRV (RFC 3263)
QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS DSCP
SRTP for voice
Transport Layer Security (TLS 1.3)
HTTPS certificate manager
AES encryption for configuration file (AES256)
Digest authentication
OpenVPN, IEEE802.1X, L2TP VPN
IPv6
LLDP/CDP/DHCP VLAN
ICE
WPA2/WPA3
Secure boot
GARP (Generic Attribute Registration Protocol)
- Model #: SIP-T31G

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Yealink SIP-T28P Executive IP Phone w/POE- Brand: Yealink
- Type: Wired VoIP
- Security: HTTPS (server/client)
SRTP (RFC3711)
Transport Layer Security (TLS)
VLAN (802.1 pq), QoS
Digest authentication using MD5/MD5-sess
Secure configuration file via AES encryption
Phone lock for personal privacy protection
Admin/user configuration mode
- Ports: 1xRJ9 (4P4C) handset port, 1xRJ9 (4P4C) headset port, 2xRJ45 10/100M Ethernet ports, 1xRJ12 (6P6C) expansion module port
- Model #: YEA-SIP-T28P