User Capacity: Supports up to 300 users, expandable to 500 users

Concurrent Calls: Handles up to 60 simultaneous calls, expandable to 120 calls

Modular Design: Equipped with 3 expansion slots to flexibly support:
Up to 24 FXS/FXO/BRI ports
Up to 6 GSM/CDMA/3G/4G channel
Up to 3 E1/T1/PRI ports

Connectivity:
1 x Gigabit Ethernet WAN port
1 x Gigabit Ethernet LAN port
1 x USB port
1 x RS232 console port
6 x antenna sockets for cellular modules

Audio Codecs:
G.711 (A-law/μ-law), G.722, G.726, G.729A, GSM, Speex, ADPCM, iLBC

Video Codecs:
H.263, H.263P, H.264, MPEG4

Fax Support:
T.38 Fax over IP

Protocols & Features:
Supports SIP (RFC3261) and IAX2 protocols

Features include:
Voicemail
Call recording
Auto provisioning
LDAP integration
Fax to email
Mobility extension
Interactive Voice Response (IVR)
SIP forking
Voicemail to email
Find Me/Follow Me
Call monitoring
Call Detail Records (CDR)
Video calls
User privileges management

Management:
User-friendly web-based interface for configuration and management
Supports remote management and monitoring

Security:
TLS and SRTP encryption for secure communications
Built-in firewall and advanced failover capabilities

Mounting: 1U rack-mountable design