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Obi110 breaks POTS call waiting

Maybe this will help.
»www.obitalk.com/forum/index.php?topic=4926.0

reply to JTS33
It may be that this could apply:

»[Voip.ms] Receiving a second call using the FLASH command

reply to JTS33
Alternatively, there is also a parameter in the Phone port settings Calling Features area called, "HookFlashHandling." The default setting is: Handle Hook Flash Locally
Set this to: Send Hook Flash to PSTN

Parameter setting descriptions from the OBi Device Admin Guide:
»www.obihai.com/docs/OBiDeviceAdminGuide.pdf

Handle Hook Flash Locally
This is the normal setting, where the device intercepts all the hook flash events detected on the PHONE port, and acts on them accordingly, such as:
- Hold current call and start second dial tone for 3-way calls
- Start a 3-way conference
- End call with 2nd conferencee in a 3-way conference
- Swap between two calls in a call-waiting situation

Send Hook Flash Signal to PSTN
Device does not act on hook flash events detected on the PHONE port. It either ignores hook flash events OR regenerates similar hook flash events on the PSTN line if the phone user is currently in a call using the PSTN line service when the hook flash event happens. This option may be useful in cases where the user has traditional call-waiting or 3-way calling services on his PSTN line service; hence he can control those PSTN supplementary services using hook flash signals. However, the OBi in this case would automatically disable its own call-waiting function on the PHONE port, and the user would have no means to tell OBi to make 3-way calls.

Note that an alternative way to let the OBi generate a hook flash signal to the PSTN line is to use a double hook flash event by hook flashing twice within 700 ms. See the description of the parameter EnableDoubleHookFlash in this table. With this enabled, you can still let the device handle normal hook flash event locally and preserve the call-waiting and 3-way calling functionality.

This option is only available in OBi110

reply to JTS33
It's a feature . . .

reply to PX Eliezer

reply to ShermanObi

When working with a PSTN analog circuit call, once you send a hook-flash event to the CO, your PSTN session will be 'altered' by the CO and the OBi will have less (or no) control to perform supplementary services on its own, e.g. place a call on hold, get a second dial tone (call conferencing) / answer the incoming call (call waiting).

Since the OBi110 handles multiple services, comprised of SIP+GV+OBiTALK VoIP sessions and PSTN analog circuit calls, the OBi110 is like a CO, in its own right, and can be smart about how it handles hook-flash events initiated by attached phones, e.g. The OBi knows to send a single hook-flash to the VoIP service and double hook-flash to the LINE port (PSTN).

So, like the admin guide says, "This may be useful in cases where the user has traditional call-waiting or 3-way calling services on his PSTN line service; hence he can control those PSTN supplementary services using hook flash signals. However, the OBi in this case would automatically disable its own call-waiting function on the PHONE port, and the user would have no means to tell OBi to make 3-way calls."

The OBi110 can have up to 2 independent commercial VoIP services, OBiTALK P2P service as well as an analog service connected to the LINE port. Using the double hook-flash is the only way to maintain supplementary services (call waiting, 3-way calling) support in both the PSTN and VoIP worlds.

You might want to open a ticket with Obihai tech support to see why double hook-flash is not working for you.

reply to JTS33

reply to ShermanObi

reply to Stewart