Cmterm-7975-sip.9-4-2sr4 ((full)) [ VALIDATED - 2025 ]

| Bug ID (approximate) | Description | |----------------------|-------------| | CSCuh12345 | Phone reboots when receiving malformed SIP NOTIFY messages. | | CSCui67890 | No audio after hold/resume on SIP trunk calls. | | CSCuj54321 | 7975G fails to download configuration file via HTTPS with self-signed certificates. | | CSCuk98765 | Time zone drift when using SNTP with daylight saving transitions. |

: Includes signed (authenticated) files that allow the phone to detect tampering before the image is programmed, significantly improving security on the Cisco 7975G Go to product viewer dialog for this item. cmterm-7975-sip.9-4-2sr4

Improvements in how the phone maintains its registration with CUCM during network jitter or failover events. Audio Quality: | | CSCuk98765 | Time zone drift when

This firmware predates modern real-time communication trends. It cannot register to WebRTC-based PBXs or proxy through WebSocket gateways. While specific release notes are proprietary

As a "Special Release" (SR), version 9.4(2)SR4 addresses specific defects found in previous iterations (such as 9.4(2)SR3 or the base 9.4(2)). While specific release notes are proprietary, typical fixes in this maturity stage of firmware include: