Dynamix DW 4 FXO User's Guide download pdf (Page 83)

7. FLASH command generation and detection on FXO and

FXS gateway.

FLASH feature is widely used for PABX extension to implement PABX’s

advanced features such as Call Transfer, Call Hold, Conference,

Forwarding or Call Park and others. PABX relies on extension’s analog

phone set to generate Flash time to inform PABX this is an FLASH command.

In this FXO+FXS P2P Hotline application, FXS needs to detect a FLASH

command from analog phone set and transmit to FXO gateway via VoIP

network. Then, FXO generates an equivalent Flash time to PABX. Here are

step to step guidance to configure this function at both FXO and FXS gateway.

Step 1 : Setup FXS Flash detection time range.

Since FLASH command was initialized from analog phone set, check what flash

time this phone set can generate. Then, configure FXS gateway flash time

detection range. See Figure 27 as follows. Go to FXS Setting



Others



setup Minimum and Maximum Flash Time range. Note : the analog

phone flash time should be located inside FXS gateway setting range to detect

an Flash command correctly. Once FXS detect this command, it sends to FXO

gateway via SIP IP protocol automatically.

Figure 27. Setup FXS Flash detection time range.

Step 2 : Setup FXO Flash time generation.

Go to FXO Setting  FXO Line  Modify Line Setting  Flash Time (msec). See

Figure 28. Flash time has to match PSTN or PABX Flash command specification.

Consult to PSTN or PABX technician to fill in proper time.

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Dynamix DW 4 FXO User's Guide Page 83