ACOM516W-16 VoIP Gateway

EjoinTech is a professional developer and manufacturer of VoIP products. EjoinTech provides ACOM brand VoIP communication devices and solutions. And we also offer customized products and OEM service. They are a cost-effective gateway for SOHO, SMEs and system integrator and it also opens up new revenue generating opportunities for service providers. 


ACOM516W series is able to process traditional voice call service and internet data service. Compare to the ACOM508 GSM/CDMA/WCDMA series VoIP Gateway, ACOM516W series adapt new hardware and software structure, which supports up to 16 concurrent calls.

  • Support G729a/b/e,G723.1,G.711 A/U law, iLBC auto-selecting
  • EBO(Ejoin Bandwidth Optimization)
  • Proxy Encryption Solution for IP Block
  • Support SIM Bank
  • VPN(pptp)
  • SIM Card Rotating(ACOM516W-16)
  • Solution to solve the SIM card blocked by
  • Accumulated Call Duration
  • Accumulated Connected Calls
  • Accumulated Calls
  • Consecutive Failed Calls
  • Consecutive No-Alert Calls
  • Consecutive No-Answer Calls
  • Consecutive No Carrier Calls
  • Consecutive Short-Duration Calls
  • Station intelligent switching
  • ERMS(Ejoin Remote Management System)
  • Port Inter-Calling
  • Fake Ring-back
  • Call Duration Limitation for SIM Card/Single
  • Dial Plan/Prefix Inward Translation/Intelligent Routing
  • Web Browser: Firefox/Chrome /IE/Opera


ACOM 516W-16

Number of Channels

16 channels 16 SIM



SIP Specification

SIP/2.0 RFC3261

Session Timer RFC4028


Network Protocols





Telephony Features

Hot-line call ,Dial plan, Speed dial, Phone book, CDR, LCR, White/Black list

Telephony Signaling

DTMF tone dectection/generation

DTMF relay: in-band, RFC 2833 and SIP info

Call forward: unconditional, no answer and busy

N-way conferencing

Caller ID display/generation, Mobile Number Portability

Voice Capability

Voice codecs:G729a/b/e,G723.1,G.711 A/U law, iLBC

Echo cancellation

Silence suppression & detection(VAD, CNG)

Adaptive jitter buffer

Volume adjustable

IVR customized

Number of Ports

1 WAN 10/100Base-T ethernet(RJ-45 connector)

1 LAN 10/100Base-T ethernet(RJ-45 connector)

1 Console(USB)


1 Power and 16 groups of card online and running status indicator

Power Supply

100-240VAC, 50 - 60 Hz IN, 12V/5A OUT

Operating Environment

Operating temperature: 0 - 50ºC

Operating humidity: 10 – 90%RH


12 Months

  • SMS Send, Receive and Forward(GSM/SIP/HTTP)
  • SMS Inbox
  • AT Command , USSD
  • SMS Format: PDU/TXT
  • PIN Code Management
  • CDMA Delay Answer
  • GSM Polarity Reversal
  • Carrier Selection
  • Caller ID Hidden(need SIM Card support)
  • Multi-language Interface
  • USB Serial COM
  • Configuration Backup and Restore
  • Support HTTP/TFTP Upgrade
  • Call statistics: ASR,ACD,PDD
  • Ejoin Remote Management System