IP Telephone Server

Max number of users

24

Max number of self-contained analog ports

4

Number of IP extension 

20

Number of IP outside line

24

Maximum number of simultaneous calls (with recording)

24

Number of concurrent Nonghao™ Agent Clients

20

Media

Caller ID Multiple caller ID standards

Bellcore Type 1&2, ETSI, BT, NTT, DTMF

Encoding

G.711 (a/μ), G.729a, G.722.2, G.722

DTMF transmission

In-band voice transmission, RFC2833, SIP-INFO

Fax

G.711 Transmission Fax, T.38 Fax, Compatible with Class G3 Fax Machines, Maximum Rate 33.6kbps (Transmission/T.38 V3)

Cable removal method

Busy tone detection, reverse polarity detection, power failure cable removal

Sound Quality Enhancement Technology

Echo cancellation (G.168-2004, trailing time 64ms), jitter buffer auto adjustment

Safety

Port Customization

SIP port, HTTP/HTTPS access port, RTP port

Encryption

Encryption

SIP signaling encryption, media stream encryption, configuration file encryption import/export, password/PIN encryption.

IP Extension

Blocking outside IP extensions from making outgoing calls, User-Agent authentication, brute-force breaking of IP extension passwords.

Anti-Malicious Intrusion

Malicious IP locking, access whitelisting, dynamic defense, static defense.

Security Level

Supports high, medium and low levels