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Grandstream Networks HT502 User Manual page 26

Dual fxs port analog telephone adaptor
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Flash/Hook
Toggles between active call and incoming call (call waiting tone). If not in conversation, flash/hook
will switch to a new channel for a new call.
#
Pressing pound sign will serve as Re-Dial key.
FIRMWARE VERSION 1.0.12.4
HT502 USER MANUAL
Page 24 of 54
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