[Misc] TA 5501 Fax with voip connection not working reliably

[Doug James]

I have had all kinds of problems with this fax. Used tech bulletin 90 to try to resolve errors. Going back this week they say fax is not working at all. Last time I was there I turned the ECM off and slowed baud rate to as low as it would go. My question is... Is their a VOIP that simply will not accept a fax transmission. Also on a separate fax issue. How can the VA send encrypted faxes which has never worked. Thanks so much for any help !!!!

[bsm2]

Re: TA 5501 Fax with voip connection not working reliably

Do a reset on fax and start again.
I would get with there voip vendor and make sure things are set correctly on their end and if they recommend any changes to the equipment.

[copiertec]

Re: TA 5501 Fax with voip connection not working reliably

There may be a problem with the fax line possibly noise? You could have the fax provider check for that. One other thing, I know on Sharp fax kits they recommend using a 2 conductor phone cable for the fax as opposed to the 4 conductor, it may be worth a look at.

[Santander]

Re: TA 5501 Fax with voip connection not working reliably

I have had all kinds of problems with this fax. Used tech bulletin 90 to try to resolve errors. Going back this week they say fax is not working at all. Last time I was there I turned the ECM off and slowed baud rate to as low as it would go. My question is... Is their a VOIP that simply will not accept a fax transmission. Also on a separate fax issue. How can the VA send encrypted faxes which has never worked. Thanks so much for any help !!!!

Try following TB 99 for fax on VOIP. I have not run into a VOIP implementation that I could not get to work, though sometimes very slowly. First step, never turn off ECM. If a packet is dropped and ECM is OFF the machine cannot request a resend resulting in a failed transmission. One of the biggest problems with fax on VOIP is the loss of packets which interrupts the critical fax timing. Fax being designed for an analog phone system has very explicit timing requirements which if not followed result in a failed transmission/reception. I have had to change incoming and outgoing DB levels and even the echo timing to get some to work. The lowest baud rate I have had to set was 9600. As for your second question, Kyo units from the early 90's had an encryption mode built into the fax system. The user selects the encryption key, securely sends it to the receiving user who enters it into their machine then all communications between the units is encrypted, works quite well. Have a few drug enforcement units using it. They have a network wide encryption key and encryption keys for individual locations and headquarters, prevents someone from tapping a fax line and recording the transmission and then playing it back to a fax to see the transmission because the encryption key exchange is interactive and without the proper response the key is considered not valid.

[Doug James]

Re: TA 5501 Fax with voip connection not working reliably

Do a reset on fax and start again.
I would get with there voip vendor and make sure things are set correctly on their end and if they recommend any changes to the equipment.

Thanks so much, Also how do I reset the fax. I looked and couldn't find anything on that. I am going to have there phone guys out there finally. Was like pulling teeth....

[Doug James]

Re: TA 5501 Fax with voip connection not working reliably

Try following TB 99 for fax on VOIP. I have not run into a VOIP implementation that I could not get to work, though sometimes very slowly. First step, never turn off ECM. If a packet is dropped and ECM is OFF the machine cannot request a resend resulting in a failed transmission. One of the biggest problems with fax on VOIP is the loss of packets which interrupts the critical fax timing. Fax being designed for an analog phone system has very explicit timing requirements which if not followed result in a failed transmission/reception. I have had to change incoming and outgoing DB levels and even the echo timing to get some to work. The lowest baud rate I have had to set was 9600. As for your second question, Kyo units from the early 90's had an encryption mode built into the fax system. The user selects the encryption key, securely sends it to the receiving user who enters it into their machine then all communications between the units is encrypted, works quite well. Have a few drug enforcement units using it. They have a network wide encryption key and encryption keys for individual locations and headquarters, prevents someone from tapping a fax line and recording the transmission and then playing it back to a fax to see the transmission because the encryption key exchange is interactive and without the proper response the key is considered not valid.

Wow, this is really cool. Thank you so much for this. Very Grateful. I am heading there tomorrow and this really helps !!!!

[Doug James]

Re: TA 5501 Fax with voip connection not working reliably

There may be a problem with the fax line possibly noise? You could have the fax provider check for that. One other thing, I know on Sharp fax kits they recommend using a 2 conductor phone cable for the fax as opposed to the 4 conductor, it may be worth a look at.

I checked that when I was there last, thanks to you.... The plug is a 4 pronged plug but is like 20 ft long estimated and I haven't been able to find one so far...

[avio2]

Re: TA 5501 Fax with voip connection not working reliably

[QUOTE=Doug James;1803436]

[avio2]

Re: TA 5501 Fax with voip connection not working reliably

Thanks so much, Also how do I reset the fax. I looked and couldn't find anything on that. I am going to have there phone guys out there finally. Was like pulling teeth....

U600 Initializing all data
AFTER SET YOUR CONTRY

[Doug James]

Re: TA 5501 Fax with voip connection not working reliably

Well I went back there today. I am thinking that they are running as good as possible. The previous visit I turned the ECM off and set to the lowest baud rate. In retrospect I believe this was a fatal error. When I got there they were using there Ecosys M series. They said they had no problems with it. I took the settings from the ecosys and put them on the TA 5501. After Initializing the fax. I sure do appreciate the responses !!!

[ntbann]

Re: TA 5501 Fax with voip connection not working reliably

When I have A customer using a 4 wire phone line. I peel the outside coating back and cut the yellow and black wires.

[Doug James]

Re: TA 5501 Fax with voip connection not working reliably

When I have A customer using a 4 wire phone line. I peel the outside coating back and cut the yellow and black wires.

Thanks so much !!! Appreciate your response !!!

[Scott]

Re: TA 5501 Fax with voip connection not working reliably

I have never seen VOIP work reliable

[bsm2]

Re: TA 5501 Fax with voip connection not working reliably

I have never seen VOIP work reliable

been working for years now

[guitar9199]

Re: TA 5501 Fax with voip connection not working reliably

been working for years now

Reason being, the line is a "VOICE" over IP line. They're notorious for having gaps and breaks in the signal, most likely due from the conversion from Analog to Digital, then back to Analog. The human ear can hear "between" the gaps in a voice speaking to you and you can understand what's being spoken, but the fax board hears those same gaps in the data, and says, "Whiskey Tango Foxtrot", then errors out.

Most manufacturers have a VOIP procedure that helps, but the only sure-fire cure is for the customer to use a standard twisted pair analog phone line for faxing. Some providers offer a "FOIP" line that's supposed to make faxes behave better, but I don't have much experience with those.