Why choose SK gateway ?
A lot of clients now are complaining about the blocking issues. First, you may know why the Operator blocks you frequently? Second, what are the rules for the blocking? Third, how can we reduce it, even avoid it? There are some rules I have found out for you.
#Operator detects you SIM cards are abnormal. The explain is because the Operator affirms your SIM cards are not being used by a human, instead some certain devices.
Solution: On one hand, the SK gateways are designed with a function which copies a human’s behavior of using a SIM card and makes it look like a human is using it. On the other hand, the SK gateways also can copy a human’s behavior of sending SMS and making calls among the ports. All the functions can be set by the setting page of the SK gateways.
#Operator detects the calls of its continuous minute. Once the SIM cards reach a certain continuous minute, SIM cards block.
Solution: Our SK smart gateways can be inserted 4 SIM cards each port and support the SIM cards making calls circularly itself. For this advantage, you can set when 1 SIM card reaches a certain continuous minute, then goes to next SIM card to make calls. Also, we can set it sending SMS more frequently to reduce the blocking.
#Operator detects if your SIM cards are making call according to the same base stations.
Solution: Normally, when people are making calls, our phones are searching for the best signal from the base stations and they will not always use the same base stations; they will move and change different base stations. According to this Operator’s blocking rules, our SK gateways can change different base stations to make calls, even if you’re making calls.
#Operator detects the IMEI No. of SIM cards and blocks it.
Solution: Our SK gateways can be set to change IMEI No. Automatically to avoid blocking issues.
SK8-8 and SK8-32 support 8 calls at one time,which is different in the number of SIM cards it can insert. SK8-8 can insert 8 SIMs while SK8-32 can insert 32 SIMs at most,means 4 SIMs in one channel.pls check as follow pic:
8 ports with 8 SIMs GSM VOIP Gateway:
8 ports with 32 SIMs GSM VOIP Gateway:
Special Features:
| Model | SK8-8 / SK8-32 |
| Number of Channels | 8 channels |
| Frequency | GSM: 850/900/1800/1900MHz |
| CDMA:800/1900MHz | |
| WCDMA:850/900/1800/1900/2100MHz | |
| 4G : EC20-E FDD LTE: B1/B3/B5/B7/B8/B20 UMTS: B1/B5/B8 GSM: 850/900/1800/1900MHz EC20-A FDD LTE: B2/B4/B5/B12/B17 UMTS: B2/B4/B5 GSM: 850/1900MHz EC20-C 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 | |
| STUN | |
| Network Protocols | DHCP / PPPoE / VPN(pptp) |
| NTP | |
| Telnet / HTTP / FTP / TFTP | |
| Encryption:Security,VOS2000,RC4,XOP.Base64 | |
| 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) | |
| LEDs | 1 Power and 8 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 | |
| Warranty | 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
