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C81

One‐button SIP Door Phone

The C81 is an One‐button SIP Door Phone with advanced audio system with the echo cancellation function. with the C72 touch screen control pad, you can speak to visitors at any time.

The C81 offers key-less control and convenience for the users opening the door without a key. The door can be open remotely if there is an electronic door lock. It’s ideal for control communication and security over internet such as business,institutional and residential applications.

Features

Aluminum surface, Metal bottom shell
1 call button
DTMF Mode: In‐Band, RFC2833 and SIP INFO
DHCP/Static/PPPoE
STUN, Session timer
DNS SRV/ A Query/NATPR Query
HTTP/HTTPS/FTP/TFTP
TCP/IPv4/UDP
SIP over TLS, SRTP
Configuration backup/restore
Syslog
SNMP/TR069
Configuration keypad‐based management

HTTP/HTTPS Web Management
Auto provisioning: FTP/TFTP/HTTP/HTTPS/PnP
Comfort noise generator(CNG)
Voice activity detection (VAD)
Codec: PCMA, PCMU, G.729, G723_53, G723_63, G726_32
Wideband codec: G.722
Two‐way audio stream
HD voice
Action URL/Active URI remote control
Default auto answer
Door Phone features
Door Access: DTMF tones
One SIP line, Dual SIP servers

CDR

DDNS

SIP

TR069

Backup

Security

One‐button SIP Door Phone

HD Voice
Door Access: DTMF tones
Ideal for business, institutional and residential applications
Open remotely if there is an electronic door lock
One SIP line, Dual SIP servers
Door Phone features
Two‐way audio stream

sip-door-phone

sip door phone

sip door phone

High Stability and Reliability

SIP v1 (RFC2543), v2 (RFC3261)
SIP over TLS, SRTP
TCP/IPv4/UDP
HTTP/HTTPS/FTP/TFTP
ARP/RARP/ICMP/NTP
DNS SRV/ A Query/NATPR Query
STUN, Session timer
DHCP/Static/PPPoE
DTMF Mode: In‐Band, RFC2833 and SIP INFO