Welltech FXS SIP Gateway V.2.9 - Manual (Page 124)

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FXS Gateway Overview
Flash frequency high : 800
Flash frequency low : 400
usr/config$
Figure 21-45 phone –print flash command
21.7.18 [rom]
ROM file information and firmware upgrade function.
usr/config$ rom
ROM files updating commands
Usage:
rom [-print] [-app] [-boot] [-dsptest] [-dspcore] [-dspapp]
[-ht] [-method used] [-boot2m]
-s TFTP/FTP server ip -f filename
rom -print
-print show versions of rom files. (optional)
-app update main application code(optional)
-boot update main boot code(optional)
-boot2m update 2M code(optional)
-ht updata Hold Tone PCM file(optional)
-dsptest update DSP testing code(optional)
-dspcore update DSP kernel code(optional)
-dspapp update DSP application code(optional)