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GSM Gateway imsi catcher 256 slots Goip SIM 32 ports voip gateway

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Quick Details

Place of Origin: Guangdong China
Warranty: 12 Months
Support: VPN, Proxy Relay,
Color: Skyline Blue asterisk voip gsm gateway
Port: 32 asterisk voip gsm gateway
Encryption: VOS3000
Model Number: SK 32-256 GSM Gateway
Voice Codec: G729 a/b/e,G723,G711 A/U law,iLBC
Power Supply: 100-240 VAC
Name: asterisk voip gsm gateway
Brand Name: SKYLINE
Type: VoIP Gateway
Protocol: SIP / H323 / TCP-IP / DUP...
Sim Slot: 256 SIM Cards asterisk voip gsm gateway
Selling Units: Single item
Single package size: 50X50X12 cm
Single gross weight: 6.5 KG
Package Preview: https://sc04.alicdn.com/kf/H795411117abf472ebe24f67c49beced7D.jpg_640x640.jpg,https://sc04.alicdn.com/kf/Hb791f613db7b4f2ab20a6b6d296e32c80.jpg_640x640.jpg
Skyline (Shenzhen) Technology Co., Ltd.
Gold Supplier
Trading Company
Response Time
On-time delivery rate
US$ 160,000+
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 GSM Gateway imsi catcher 256 slots Goip SIM 32 ports voip gateway


      32-256 is a multi-functional and high performance product, which convert GSM network to VoIP.
It supports 32 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.

  • 32 Channel, Support 256 Sim Card in total. 1 channel 4 Sim card rotating, which can get rid of Sim card blocking efficiently.
  • Base Station Swich prevent Sim card blocking.
  • Changing SIM automatically protect Sim card from blocking.
  • Relay Encryption Solution fixed IP blocking.
  • VPN protect port from blocking
  • Sim card hot plug
  • Bandwidth Optimization enhance the communication quality
  • IMEI Change support
  • Intercall support
  • Human behavior support
  • Base Station change
  • Blacklist and whitelist
  • Call Interval time support
  • SMPP / http protocol support, open API for SMS
  • USSD / AT Command / DTMF / call wait / hotline / caller hide support


32-256 series is able to process traditional voice call service and internet data service.
Compare to the32-256 GSM/CDMA/WCDMA series VoIP Gateway,

32-256 series adapt new hardware and software structure, which supports up to 32 concurrent calls.

1) Support 4/8/16/32 Ports, auto sim switch by call minutes/SMS limit per sim/day.
2) 2G/3G/4G models all available.
3) Support work with Call Center Software, IPPBX, 3CX,Elastic,Asterisk, Vos,VPS, Freeswitch, Softswitch Cicso etc.
4) Free Firmware Version upgrade online and Remote Centralized Management.
5) Free lifetime Tech Support 7x24x365


Mobile Features:
1.SMS and call Send, Receive and Forward(GSM/SIP/HTTP)
2.SMS Inbox
3.AT Command , USSD
4.SMS Format: PDU/TXT
5.PIN Code Management
6.CDMA Delay Answer
7.GSM Polarity Reversal
8.Carrier Selection
9.Caller ID Hidden(need SIM Card support)



SK 32-256

Numbers of Channel 


Numbers of SIM Support 


SIM Frequency 


Call Protocol 

SIP V2.0 RFC3261


Network Protocol 



Telnet, STUN




Operating Environment  

Built-in Cooling Fans

Power Input:100-240V~50-60Hz 1.2A MAX

Power Output:12V/5A

Working Temperature:0~+50°C

Working Moisture: 10 ~ 90 % RH



Other Specification  

Linux Operation(Safe & Stable)

HTTP Web Browser: Firefox/Chrome /IE/Opera

Caller Anonymous

Avoid FAS


Echo/Silence control

VOL control

32 Antennas





 Maintenance and Management:
1.Multi-language Interface
2.USB Serial COM
3.Configuration Backup and Restore
4.Support HTTP/TFTP Upgrade
5.Call statistics: ASR,ACD,PDD
6. Remote Management System


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

Anti-sim blockage Solution:
Human behaviour feature
* IMEI modify & Band & PIN Modify
* Port Inter-calling/sms
* Base Station intelligent switching
* Multiple SMS control
* Access to internet surfing
* Call wait
* Call duration control
* Internet surfing



 SK Applications.jpg






 What is main funtion of the 32 ports 256 sims gsm voip SK SMS gateway?
It is widely used in mobile marketing, verify code, bulk of SMS and corporate SMS.

What is the software can be supported by SK gateway?
VOS,VPS,VoIP switch,3CX,P·B·Xes,free PBX,MOR

How about our service?
We have professional engineer to help you about all your tech problems anytime,the satisfaction of our customers is our greatest desire.

What is our main express shipment?
DHL,UPS,FEDEX,TNT,EMS(can ship to anywhere all over the world)

How long we're warranty ?
1year or more

During warranty time,if have problem,how to do?
we'll test by teamview or send back,we'll exchange new in free.

How long about our techinical support?
in free,forever






SK8-32(02).jpg  SK 16-128(02).jpg  SK16-64.jpg  SK32-256(03).jpg 

            SK 8-32                      SK 16-128                     SK 16-64                   SK 32-256