| Summary: | DAHLIN-00215: Polarity is Reversed on FXS ports, TDM400P | ||
| Reporter: | Vladimir Mikhelson (vmikhelson) | Labels: | |
| Date Opened: | 2010-10-03 22:48:50 | Date Closed: | 2019-05-31 09:43:30 |
| Priority: | Minor | Regression? | No |
| Status: | Closed/Complete | Components: | wctdm |
| Versions: | 2.3.0.1 | Frequency of Occurrence | |
| Related Issues: | |||
| Environment: | Attachments: | ||
| Description: | Polarity is reversed on all FXS ports. "options wctdm reversepolarity=1" in dahdi.conf fixes the issue. ****** ADDITIONAL INFORMATION ****** Asterisk 1.6.2.12 DAHDI 2.4.0 | ||
| Comments: | By: Shaun Ruffell (sruffell) 2011-04-15 14:10:44 I know this has been sitting here for awhile, but are you saying that the TDM400 violates some spec, or just wanted to take a note that reversepolarity resolves an issue in your setup? By: Alec Davis (alecdavis) 2011-04-15 16:55:34 IIRC when VMWI Line reversal and VMWI neon DC generation were implemented the idle line condition became the same polarity to allow OnHookTransfer to happen without requiring a line switch. Still requires a polarity switch as ring starts. By: Vladimir Mikhelson (vmikhelson) 2011-04-15 20:38:43 @sruffel In my opinion it is a spec violation. I used a standard phone polarity tester to confirm. It is not special to my setup in any shape or form. By: Bennie Sexton (bsexton) 2011-05-03 21:10:33 The RJ11 jacks on the TDM400 are wired contrary to what would be expected in a properly wired RJ11 jack. This fact is however clearly reflected in the manual. It is a bit odd, but not a new find. | ||