Hello Experts.
A few weeks ago I started a weekend project to build a USSD Gateway for IMS / VoLTE, and it didn’t work.
Here’s what I learned in the process!
Failures in cobbling together a USSD Gateway
Adventures in setting up a non-working USSD Gateway for IMS
Read more:
I am curious. How did you get the 4G phone to send USSD via SIP (instead of CSFB) in the first place ?
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| VoLTE block call due to SIP 500 Internal server error | 3 | 2316 | June 2, 2023 | |
| SMS fails to be delivered on iPhones | 11 | 432 | April 24, 2024 | |
| VoLTE Issues | 4 | 5210 | February 23, 2022 | |
| B part is latched on 4G, but still fall backs to CSFB when call is received | 9 | 87 | August 25, 2024 | |
| VoLTE / IMS - Analysis Challenge | 0 | 1498 | September 22, 2023 | |
| DUT not sending PDN request for IMS and SIP Registration Request | 17 | 2497 | October 9, 2020 | |
| PDN Connectivity Request for VoLTE Service with PDN Type: IPv6 - IMS Not Supporting IPv6 | 2 | 174 | July 29, 2024 | |
| What are the reason Blocked Call Caused "SIP invite failure" in VoLTE? | 18 | 3530 | April 15, 2024 | |
| VoLTE Setup fail due to 486 busy reason | 4 | 2781 | August 20, 2020 | |
| IPhone 12 attached to 4G but no IRAT to 3G | 21 | 1938 | March 29, 2022 |
