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Key Benefits

  • IP PBX for up to 500 subscribers
  • Up to 100 simultaneous calls
  • Up to 4 E1 flows (RJ-48)
  • 4 LAN ports
  • Call center functionality
  • Call recording

Short description
The enterprise IP PBX SMG-500 connects up to 250 SIP subscribers in basic configuration and can be extended to 500 SIP subscribers when acquiring an appropriate lisence1.
The E1 ports and SIP trunks can be used for PSTN connection. Analogue phones are connected to SMG-500 via subscriber VoIP gateways, IP phones - directly through the company network. Call records and CDR files are stored on SD card or USB flash drive. It is also possible to upload files to external media and to FTP server automatically.


Out of Stock
  • Interfaces

    • 4 Е1 (RJ-48) ports
    • 4 ports of Ethernet 10/100/1000Base-T (RJ-45) 
    • 1 port of USB2.0, 1 port of USB3.0
    • 1 slot for SD card
    • 1 COM port (RS-232, RJ-45)

    VoIP protocols

    • SIP, SIP-T/SIP-I
    • H.323

    Advanced SIP/SIP-T/SIP-I features

    • SIP and SIP-T/SIP-I interaction

    TDM protocols

    • SS7
    • PRI (Q.931)
    • Q.699 (PRI and SS7 interaction)

    Voice codecs

    • G.711 (a-law, μ-law) 
    • G.726
    • G.729 (A/B) 
    • OPUS1 
    • AMR1

    Voice standards

    • VAD (Voice Activity Detection)
    • CNG (Comfort Noise Generation)
    • AEC (echo cancellation, G.168 recommendation)


    • Interactive voice response system (IVR) with graphic editor
    • DISA - Direct Inward System Access
    • Call queue: 
      • Various algorithms for operators selection
      • Call distribution considering repeated calls from clients 
    • Reporting system for operators/groups of operators (processed calls, missed calls, average waiting time etc.)
    • Phone book: 
      • Creating a phone book from station subscribers list  
      • Transferring a phone book to subscribers via LDAP 
      • Obtaining a display name from LDAP server
    • Video processing: 
      • Video transmission in the Video Offroad mode

    Call management

    • Number modifications before and after routing
    • Call recording according to parameters
    • Subscriber lines restriction
    • Subscriber service mode configuring
    • Trunk group cut-off
    • Direct connection of trunk groups
    • Prefix for few trunk groups
    • Limiting the number of simultaneous calls to a SIP interface
    • Ingress load limiting (calls per seconds) for a trunk group
    • Interaction with STUN server via SIP interfaces 

    Quality of Service (QoS)

    • Diffserv assignment for SIP
    • Diffserv assignment for RTP1 


    • Transmission via INBAND, RFC 2833, SIP INFO, SIP NOTIFY methods


    • Billing data is recorded in CDR file. CDR files are written on a local SD disk, USB flash or remote FTP server concurrently
    • RADIUS Accounting
    • Supported billing systems: 
      • Hydra Billing 
      • LANBilling 
      • PortaBilling 
      • NetUP 
      • BGBilling
    • Possible integration with other systems

    Value Added Services

    • Call Forwarding:
      • Call forwarding on out of service (CFOS)
      • Call forwarding on no reply (CFNR)
      • Call forwarding unconditional (CFU)
      • Call forwarding on busy (CFB)
      • Call forwarding on time (CFT)
    • Call Transfer
    • Music on Hold (MOH)
    • Call Hold
    • Call Hunt
    • Call Pickup
    • Busy Lamp Field
    • Conference, Add-on (CONF)
    • Conference by list
    • 3-Way conference
    • Intercom
    • Paging Call
    • Call Queue
    • Сall Back when the position in queue is reached1
    • Call Recording
    • PIN Code Access
    • Follow me
    • Follow me on no response
    • Do not disturb (DND) with white list
    • Blacklist


    • Uploading/Downloading configuration as a single file
    • Creating multiple network for telephony (SIP, RTP) with different IP addresses
    • Operation with multiple dial plans
    • SS7 signal channel redundancy
    • Voice activity control (by the presence of RTP or RTCP)1


    • Black and white IP addresses lists for registration
    • Logging of attempts to access the device  
    • Automatic blocking by IP address after unsuccessful login attempts or/and access via http/https/telnet/ssh
    • List of permitted IP addresses for access to control the device
    • Multilevel access permission 
    • SIP subscribers authentication 
    • RADIUS authentication (RFC 5090, Draft-Sterman)

    Management and monitoring

    • E1 and VoIP channels monitoring in web interface
    • Management of channels and SS7 links in web interface
    • Alarm logging with opportunity to store entries on syslog server
    • Alarm reporting SD card/USB flash
    • Emergency notification via SNMP
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