best-voice and good quality 16 port 16 sim gsm gateway

Hi, i am Bella from ejointech. this is my email: [email protected], skype: ejointech.l8, and my telephone is 0086-136-3296-3342.
Feel free to contact with me if there is any question. Looking forwrd to our cooperation.
ACOM516 GSM/CDMA/WCDMA series VoIP Gateway is a multi-functional and high performance product, which is designed with advanced embedded technology .
ACOM516 series is able to process traditional voice call service and internet data service. Compare to the ACOM508 GSM/CDMA/WCDMA series VoIP Gateway,
ACOM516 series adopt new hardware and software structure, which supports up to 16 concurrent calls and perfectly support G729a 、G723.1、G.711 a/u law and ilbc codecs at the same time.
Support G729,G729.1,G.711 a/u law,ilbc auto-selecting
Proxy encryption solution for IP blocking. Bandwith Saving technology which saves up to half of the bandwith.
SIM Card Rotating(ACOM516-64)
VPN
Solution to solve the SIM card blocked
Accumulated Call Duration Checking
Accumulated Connected Calls Checking
Accumulated Calls Checking
Consecutive Failed Calls Checking
Consecutive No-Alert Calls Checking
Consecutive No-Answer Calls Checking
Consecutive No Carrier Calls Checking
Consecutive Short-Duration Calls Checking
Station intelligent switching
SMS Send and Receive
SIM card remote insert


G.729A, G.723.1, G.711 a/ulaw audio codec standard
Echo Cancellation
Silence Suppression & Detection（VAD、CNG）
Up to16 Concurrent Calls
Support SIP V2.0 RFC3261
Section Timer RFC4028
RTP/RTCP RFC3551
SIP Registration/Point to Point mode
Dynamic/Static NAT, Ring back time adjustable
Comfort Noise Generation(CNG)
Echo Cancellation(G.168)
Jitter Buffer
Gain Adjustable


Frequency：
GSM:850/900/1800/1900MHz
CDMA: 450/800/1900MHz
WCDMA: 850/900/1800/1900+2100MHz
AT Command ,SMS/USSD
SMS Codec：PDU/TXT
PIN Code Management
Call Duration Limitation for SIM Card/Single
Black/White List
Phone Book
Dial Plan / Prefix Inward Translation / Intelligent Routing
CDMA Relay Answer
GSM Polarity Reversal
Carrier Selection
Caller ID Hidden
Call Forwarding


IPv4, TCP, UDP, PPPoE
DHCP, DNS, Telnet, STUN
HTTP, FTP, TFTP, NTP,ARP
Encryption：Ejoin,VOS2000,RC4,XOR,Base64


User Friendly Web Management Interface
Telnet Maintenance and Management
Console port safe mode
Chinese and English Interface
Configuration Backup and Restore
Support HTTP/TFTP Upgrade
Password Modification Through Web/Telnet, Multi Users
Call Statics: ASR,ACD,PDD
Call Status, System Status
Inter-Call Statics
Ejoin Remote Management System
IVR Customized