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Free lifetime technical support 4 sim card gsm sip gateway,ejoin 2g gateway 4 port gsm gateway for voip

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Quick Details

Decription: 4 Port GSM Gateway
Place of Origin: Guangdong China
Warranty: 12 months
Support: HTTP/SMPP/USSD/AT Command/SDK
Dimensions: 23.5x14.5x4cm
sim slot: 4 sim card
Encryption: Ejoin,VOS2000,RC4,XOP.Base64
Model Number: ACOM504Pro
Technical support: 365x7x24 Free lifetime support
Power Supply: 100-240VAC, 50-60Hz IN, 12V/5A OUT
Brand Name: Ejoin
Type: VoIP Gateway
Frequency: 850/900/1800/1900Mhz
Protocol: SIP/2.0 RFC3261
Selling Units: Single item
Single package size: 30X20X7 cm
Single gross weight: 2.0 KG
Package Preview:
Shenzhen Ejoin Technology Co., Ltd.
Manufacturer, Trading Company
Response Rate
On-time delivery rate
US$ 110,000+
R&D staffs
Visit Store
Quick Contact

Quick Sales Contact

Skype: ejointech.v 
Wechat: 598794489

Gurrantee & Support

* Online demo available
* User-friendly english software
* User manual & Detailed Vedio

After-Sale Service

* Free Lifetime Technical Support 
* 12 months Warranty

* Free Firmware Upgraded Online.

GSM Gateway Details

                           ACOM504 4 Ports VoIP SIP GSM Gateway

ACOM504Pro is a multi-functional and high performance product, which convert GSM network to VoIP.It supports 4 calls concurrent.With multiple call duration control and unique human behavior , customers can get high performance easily. It is widely used in call termination,call center, enterprise communication,sim active, sms verify code, sms termination, automated appointment reminder service,sim recharge and corporate sms,sms mobile marketing,wallet payment system etc.

Ejoin 4 Ports 4 sim Card VoIP GSM Gateway 

1) Support 4 Ports, auto sim switch to work based on different condition
2) 2G/3G/4G models available
3) Support work with Sip Server like Call Center Software, IPPBX, 3CX,Elastic,Asterisk, Vos,VPS, Freeswitch, Softswitch Cicso etc.
4) Human Behavour feature for Anti-Sim Blockage

5) Support USSD/AT Command/HTTP API/SMPP/SDK
6) Offer Free Software and Firmware Version upgrade online
7) Free lifetime Tech Support 7x24x365

4 Port VoIP GSM Gateway Specifications
Model Name
4 Port VoIP GSM Gateway
Telephony Features
Hot-line call ,Dial plan, Speed dial, Phone book, CDR, LCR, White/Black list
Anti-sim blockage
Human behaviour feature 
-imei auto generate/Change
-Base station change
-Inter-Port SMS Send
-Auto Switch/lock sim card
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
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
SIP Specification
SIP/2.0 RFC3261
Session Timer RFC4028
Network Protocols
Number of Ports
1 WAN 10/100Base-T Ethernet(RJ-45 connector)
1 Console(USB)
12 Months
Technical support
7X24X365 Free lifetime technical support

Special Features:

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
SIM Card Rotating(ACOM532-256)
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

Mobile Features:

SMS Send, Receive and Forward(Web/SMPP/HTTP)
SMS Inbox/Outbox
AT Command , USSD API
PIN Code Management
CDMA Delay Answer
GSM Polarity Reversal
Carrier Selection
Caller ID Hidden(need operator support)

Maintenance and Management:

Multi-language Interface
USB Serial COM
Configuration Backup and Restore
Support HTTP/TFTP Upgrade
Call statistics: ASR,ACD,PDD
Ejoin Remote Management System

GSM Gatweay Software

The system extensively supports WEB - SMPP - HTTP Interoperability, delivering service assurance while enabling perfect connectivity among Carriers and Applications

The system offers multiple devices centrelized management system.You can access device from one system remotely

Packing & Delivery
4 port VoIP GSM Gateway Package Included
Packge Size
Net weight
Gross weight

4 pieces antennas
1 power adaptor
1 network cable
1 USB cable

Packing Details : Packing, solid carton
Delivery Details : All goods can be shipped in 24hours after receive the payment.
Delivery method:DHL,UPS,FEDEX,Aramex,TNT,EMS ,etc

Yan Yan

Mobile: +86-18680091963

Skype: ejointech.v |Wechat: 598794489

Whatsapp:  +86-18680091963