SIP Protocol

 https://www.dialogic.com/webhelp/BorderNet2020/2.2.0/WebHelp/sip_ov_2020IMG.htm

 https://sipsorcery-org.github.io/sipsorcery/articles/callholdtransfer.html  

 Connect the lan cable from ONT to Laptop Download Solarwinds TFTP Server Install the TFTP Server Goto File-> Configure (Check the TFTP Root Server directory as C:\TFTP-Root) Keep the voip_kernel.ko(file) in C:\TFTP-Root check the ipconfig in cmd (you will get 192.168.1.254 as Gateway IP and System IP as 192.168.1.64) 192.168.1.64 will acts a TFTP Server and your board will act as TFTP Client ssh to 192.168.1.254 using Putty Now do the tftp command in .254 putty window  tftp -gr voip_kernel.ko 192.168.1.64 Now check the MD5SUM on your windows and linux system both should match C:\TFTP-Root>certutil -hashfile voip_kernel.ko MD5 MD5 hash of voip_kernel.ko: 88e8f9781b246b4e63429f597e21c280 CertUtil: -hashfile command completed successfully. root@Cortina:/home/ONTUSER# md5sum voip_kernel.ko 88e8f9781b246b4e63429f597e21c280  voip_kernel.ko Both the MD5SUM macthes means both are identical files Original file md5sum of original file  ------ root@Cortina:/home/AdminGPO...

  Connect the lan cable from ONT to your laptop Goto "View Network Connections" Now goto "Ethernet connection" -> "Status" -> "Details" In this you check IPv4 Gateway IP(I got 192.168.1.254) and set mask as 255.255.0.0 Open 192.168.1.254 in browser goto Software Upgrade option Download the image from path http://135.251.205.50/IMAGE/BBDR2104OpenWrtB/ BBD_2104H.508.tar download it Now extract this tar you will get multiple builds inside check AONT SW Strategy page for checking which built you need for hardware Now check http://fn-cm.sbell.com.cn/wiki/index.php/AONT:_SW_image_Strategy#SW_image_name_Strategy (for your device image) Now upload your image(3FE49544IJIL08) in "Software upgrade" option goto 192.168.1.254 username: AdminGPON password: ALC#FGU for shell password generation(goto https://dhbusec2.china.nsn-net.net/DHBUsec/ckp_handling.php?ckp=home&saml_ru=1 -> CLI 2nd level Password to enter Shell (ALU02335783)) Cortin...

  Measuring VoIP Quality with SIP and RTP (catchpoint.com) rx gain, tx gain, slic gain companding DCProfile 1. A SIP-channel only patch that works for alaw/ulaw (a bit of a kludge) 2. A technology independent patch that works for all codecs[1] that adds a SetGains(txgain,rxgain) function for adjusting incoming channels, and adds a V(txgain:rxgain) flag to Dial() for outgoing channels (much less of a kludge). Range extenders - nordicsemi.com

 https://www.tech-invite.com/fo-sip/tinv-fo-sip-service-11.html https://www.dialogic.com/webhelp/img1010/10.5.3/webhelp/description/sip/sip_3pcc_call_flows.htm

 Issue is  Why the G240W-B ONT is not registered in the Sip server? Not able to see REGISTER message itself on SIP traces Solution: Issue can be in DHCP, DNS server, IPv4/IPv6 or PPPoE server Try to check with traces for PPPoE in this case