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  • Faxing: “res_rtp_asterisk.c: Don’t know how to represent” on v5. Worked on v4

Hi all,

I recently upgraded my Issabel v4 to v5 which included an upgrade from Asterisk 16.26.0 to 18.19. I imported all the settings, including the setup to send and receive faxes using Hylafax and everything is still configured exactly the same.

However, when I’m now trying to send a fax, I get

[2024-09-14 23:01:56] WARNING[14754][C-00000074] res_rtp_asterisk.c: Don’t know how to represent ‘’
[2024-09-14 23:01:56] WARNING[14754][C-00000074] res_rtp_asterisk.c: Don’t know how to represent ‘’

in my log file and the fax fails with

Sep 14 22:59:24.11: [14450]: MODEM READ ERROR: errno 5
Sep 14 22:59:24.11: [14450]: → [0:]
Sep 14 22:59:24.11: [14450]: MODEM
Sep 14 22:59:24.11: [14450]: COMREC invalid command received/no DIS or DTC
Sep 14 22:59:24.11: [14450]: SEND FAILED: JOB 11 DEST 081219028722 ERR COMREC invalid command received/no DIS or DTC
Sep 14 22:59:24.11: [14450]: ← [9:AT+FTH=3\r]
Sep 14 22:59:24.11: [14450]: MODEM WRITE ERROR: errno 5
Sep 14 22:59:24.11: [14450]: MODEM input buffering enabled
Sep 14 22:59:24.11: [14450]: MODEM setInputBuffering::tcgetattr: Input/output error
Sep 14 22:59:24.11: [14450]: MODEM tcsetattr: Input/output error
Sep 14 22:59:24.11: [14450]: ← [5:ATH0\r]
Sep 14 22:59:24.11: [14450]: MODEM WRITE ERROR: errno 5
Sep 14 22:59:24.11: [14450]: MODEM set DTR OFF
Sep 14 22:59:24.11: [14450]: MODEM set baud rate: 0 baud (flow control unchanged)
Sep 14 22:59:24.11: [14450]: MODEM setBaudRate::tcgetattr: Input/output error
Sep 14 22:59:24.11: [14450]: STATE CHANGE: SENDING → MODEMWAIT (timeout 5)

according to the HylaFax logfile. I tried the old install (which I still have backed up) and it works just fine.

Any ideas why v18 fails to send faxes while v16 works? All configuration files and hardware is exactly the same.

TIA
SoWhy

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