Ru En
Designer and manufacturer of communication equipment
Russia (GMT +7)

Enterprise IP PBX SMG-500

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.

Use Case

use case SMG-500.jpg

Documents and files
  • 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
  • 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) 
  • OPUS
  • 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
    - Calls distribution taking into account the client repeated calls 
  • Reporting system for operators/groups of operators (processed calls, missed calls, average timeout, etc.)
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
Quality of Service (QoS)
  • Diffserv assignment for SIP
  • Diffserv assignment for RTP
  • 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 Transfer
  • Music on Hold (MOH)
  • Call Hold
  • Call Hunt
  • Call Pickup
  • Busy Lamp Field
  • Conference, Add-on (CONF)1
  • Conference by list1
  • 3-Way conference
  • Intercom1
  • Paging Call1
  • 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)1
  • Single file of configuration
  • Multiple network interfaces creation 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
  • Attempts to access the device are logged
  • 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
  • Access rights delimitation - admin/user
  • Authentication of SIP subscribers
  • 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
  • Tracings are stored on SD card/USB flash
  • Emergency notification via SNMP1
Power supply
  • AC network: 220V, 50 Hz
  • Battery: 12V
¹Not supported in the current firmware version (3.11.2)
Operational lifetime of the ELTEX equipment
In development
Mass production
Mass production is over
Sold out
Support is over
Regardless of the operational lifetime stage, Eltex provides a 12 months warranty on all its telecommunication equipment.
During the warranty period the manufacturer ensures technical support and free-of-charge repair at the Enterprise which is situated in Novosibirsk.
As part of the warranty service, technical support is provided on the first-in first-out principle.
The priority support packages of 8/5 and 27/7 types are subjects to additional charges.