Modem PYUR FAST3896 15

PYUR FAST3896-15 (experimental)

Overview

PŸUR (Germany) ships a FAST3896-15 firmware with its own /api/v1 web interface. It is a separate protocol from the Sagemcom XMO /cgi/json-req firmware handled by the sagemcom driver and from the Liberty Global /rest/v1 firmware handled by the f3896lg driver. Select the PYUR entry for this firmware.

Property	Value
Driver Key	pyur_fast3896
Auth Method	/api/v1 session with a SHA512-crypt challenge; password only (user admin)
DOCSIS Version	3.1
Default IP	192.168.100.1
Channels	SC-QAM + OFDM (downstream), SC-QAM (upstream)

Setup

1. Select PYUR FAST3896-15 (experimental) in the setup wizard or in Settings > Connection; search for "PYUR" in the modem list, it is grouped under Sagemcom.
2. Use http://192.168.100.1, or your modem's configured address.
3. Enter the modem UI password. The modem UI is password-only; the driver uses the user name admin.

Support status

Support was developed from an examined capture of FAST3896-15_PYUR-RDK_83.2.4 and automated tests. With image sha-208d8b4, the reporter confirmed successful login and data collection, followed by nominal operation after one day.

Login uses a portable SHA512-crypt implementation checked against independent vectors. The captured frontend references a helper that was not available in the capture; the reported login provides hardware evidence for this implementation on the tested modem. Automated tests alone do not establish universal firmware compatibility.

Not individually confirmed by the reporter: reboot recovery, session expiry, channel accuracy, and the device uptime and firmware fields.

Known limitations

• Upstream QAM channels report no known modulation order, and the OFDM channel has no known profile modulation.
• Counters and connection rates that the firmware does not report stay unknown instead of being shown as zero.
• Subscriber network parameters (/docsis-info/network_parameters) are not requested, because they include subscriber addresses and are not needed.

Technical details

The login flow, transport limits, and the parsing contract are described in Architecture. The test fixture used for parser tests is described in Developer Testing.

If you run this firmware, please report your results in #865.

Related

• Supported Modems
• Sagemcom F@st 3896
• Requesting Modem Support