Hook-flash required to answer incoming calls prior to about 3 rings
Demos:
I would remove all existing connections to the 2W FXS port of the OBI ATA. Then connect a a different telephone set to the 2W port in use of the OBI. If you can locate an old Western Electric (WECo) telephone, such as a 500 (Rotary) or 2500DM will make a good base line test unit to help you resolve/determine the incoming ring trouble.
Don't hesitate to use an old style rotary telephone set, such as a WEC0 CV500. All that you are interested in is to determine if the OBI is operating correctly.
At a minimum, you should use single line telephone equipment intended for POTS line service that does not use DC line current from the telephone line to operate any additional features, such as back lighted dial pad, or digital displays. A WECo 2500DM Telephone set connected to my OBI devices and have no issues.
As a point of reference. In the normal North American telephone network. 20Hz AC ringing is superimposed onto the 2 wire line voltage that originates from a CO switch, or loop carrier FXS channel unit during the two second ringing phase. DC continues to be present on the 2W line during the silent (No ring) period of an incoming call. The DC current is used as supervision to determine if the telephone station is in the idle (On Hook) or answer/busy (Off Hook) state.
Telephone equipment connected to a 2 wire loop start line will detects the presence of DC current flowing on the cable pair as a result of the low resistance short circuit, about 200 OHMS DC, that the telephone station equipment applies to the line when off hook. during the ringing phase, the low resistance short will trip, and stop the ringing circuit.
The continued presence of a low resistant short on the line maintain the telephone line in the off hook state. When the telephone goes On Hook, and low resistant short is removed, the two wire line resets to the idle. All The OBI FXS ports must follow the same electrical sequence of events and conditions just as any North American dial telephone line, since all legacy (Analog) telephone equipment must be compatible with the telephone network to work properly. ;)
Sarnia:
There is definitely an interaction issue between the General Electric Big Button CID Speakerphone and the Obi200. There are no related problems with her other phones and the Obi200. Still, I think that it is premature to blame the GE phone though. That phone worked fine with the Shaw Home Phone VoIP box that she previously had and the Bell line that she had before that.
From what I saw in the Status -> PHONE Port Status menu (frequently refreshed while I recreated the problem with the GE phone attached) as reported below (LoopCurrent 19 or 20 mA, VBAT 14 V or 15 V, TipRIngVoltage 5 V or 6V), I think that the Obi200 should have detected an Off Hook condition. What I find particularly strange though is that after about three rings or more, going Off Hook on that GE phone works fine consistently. I wonder if there is a relationship between the strange behavior and Caller ID coming in around the second ring.
I will be visiting again around Christmas time and would appreciate any feedback from someone on how I can do more in-depth diagnostics on the Obi200 while I recreate the problem. Is there for example a way to enable detailed diagnostics on a particular relevant software subsystem and then enabling Syslog? I think that I need some input from an engineer at Obihai/Polycom/Plantronics as I expect, having been an engineer at high tech product companies myself years ago, detailed diagnostics are probably available but not documented in the standard customer documentation.
A_Friend:
Does that phone have an external power supply, or is it entirely driven by the rj11 connection? If the latter, is there an option for a separate power supply?
drgeoff:
Quote from: A_Friend on September 17, 2018, 11:08:01 am
Does that phone have an external power supply, or is it entirely driven by the rj11 connection? If the latter, is there an option for a separate power supply?
GE 29369?
https://www.manualslib.com/manual/252647/Ge-29369ge1.html
Has wall-wart.
Noting that the "manual" is dated 2005 this phone may be more than 10 years old. A wall-wart that has been powered for that length of time is not above suspicion.
SteveInWA:
Quote from: A_Friend on September 17, 2018, 11:08:01 am
Does that phone have an external power supply, or is it entirely driven by the rj11 connection? If the latter, is there an option for a separate power supply?
I already explained earlier that this phone requires a wall wart (external power supply). You are not helping.
Navigation
[0] Message Index
[#] Next page
[*] Previous page