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32 Ports VOIP Gateway Cheaper VOIP Gateway SIP Gateway Products

32 Ports VOIP Gateway Cheaper VOIP Gateway SIP Gateway Products


SK 32-32 32-128 32-256 products introduction:

Skyline is a professional developer and manufacturer of VoIP products. Skyline provides SK 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 integrators and it also opens up new revenue generating opportunities for service providers. 

SK 32 ports series is able to process traditional voice call service and internet data service,  which supports up to 32 concurrent calls.

SK32-32, SK32-128,SK32-256 support 32 calls at one time,which is different in the number of SIM cards it can insert. SK32-32 can insert 32 SIMs while SK32-128 can insert 128 SIMs at most,means 4 SIMs in one channel. Similarly, SK32-256 support 8 SIMs for each channel.pls check as follow pic:

32 ports with 128 SIMs GSM VOIP Gateway:

32 ports with 128 SIMs GSM VOIP Gateway:

Special Features:


SK32-32 / SK32-128 / SK32-256

Number of Channels

32 channels


GSM: 850/900/1800/1900MHz



4G :
     FDD LTE: B1/B3/B5/B7/B8/B20
     UMTS: B1/B5/B8
     GSM: 850/900/1800/1900MHz
     FDD LTE: B2/B4/B5/B12/B17
     UMTS: B2/B4/B5
     GSM: 850/1900MHz
     FDD LTE: B1/B3/B8
     TDD LTE: B38/B39/B40/B41
     TDSCDMA: B34/B39
     UMTS: B1/B8
     GSM: 900/1800MHz

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 32 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

Mobile Features:

 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)

Maintenance and Management:

 Multi-language Interface

 USB Serial COM

 Configuration Backup and Restore

 Support HTTP/TFTP Upgrade

 Call statistics: ASR,ACD,PDD

 Remote Management System 


Q: 1 . How can I start voip business?

A: For voip business , you need devices , server , softswitch , sim cards and internet ; and our company can provide devices ,server and softswitch like vos3000.

Q : 2. If I be faced some issues about the devices , how can i solve it ?

A: The device has one year warranty , and also we provide good service , tech free but strong support.

Q :3. If i use it for call terminal , but how can i find the traffic provider?

A: Our company also deal traffic business , so for Pakistan , Bangladesh,India,Afghan,Ethiopia and so on , we can provider the traffic.

Q: 4.If your routes facing the issue for quality not good , any solution ?

A:Dear , i can suggest you some solution for the good quality , also you can use our device for the high asr and acd .

Skyline Telecom is one of the leading suppliers of 32 ports voip gateway cheaper voip gateway sip gateway products which is widely used in communication industries and many other industries. Mainly focused on Asia and Africa, we will try our best to offer our quality products to Pakistan, Bangladesh, India, UAE, etc. Under strict quality control and management system, you can rest assured to buy.


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