Hotel Teletype Machines Implementation

[jameycru]

I have a client that is a hotel chain. They are required to have TTY devices (teletype machines) on premise for the hearing impaired.

3CX has told us that they do not support these devices.

Do anyone have experience implementing these with 3CX? And if so what was your work around?

 

[cobaltit]

So technically I don't know of any PBX vendor that officially supports those type of devices. The same for any other analog phone. But many vendors do support ATAs which are used to connect analog devices to VoIP systems, including 3CX. So assuming it's an analog device you would plug it into an ATA and test.

 

[leejor]

Some users have had luck using modems, on an ATA, at lower than optimal speeds.
Have a read through this...

https://www.3cx.com/community/threads/3cx-disconnects-calls-to-a-pots-modem.69368/

Pay particular attention to the Codec used.

 

[jameycru]

Thanks, I kinda figured 711a needed to be used. I guess it is the over all operation of the device that I am concerned with.

The hotel that needs this to work is all digital . No POTs lines. Am I understanding correctly to believe that an ATA will suffice to be able to use this?

Do guests need to dial 711 to reach the TTY relay and then place their call from there?

 

[leejor]

It is not a given that this will work, as it must also be supported by your provider, and, the configuration of your network can have a detrimental affect. Analogue modems over VoIP are very finicky. You will need to thoroughly test before even thinking of offering this service.

https://www.networkworld.com/article/2319970/modems-over-voip--don-t-laugh.html

If this is to be offered from every guest room, then there may be other factors involved. As to how guests access, or use the service, in regards to dialling options, then that will all depend on how you have chosen to set up the outbound rules.

 

[jameycru]

711 is mandated by the FCC. All SIP providers are required to support it.
I have numerous hotels, A LOT, that are analog and I use gateways and ATAs so yes testing is always crucial......in our business it is anyway for everything.

I am mainly looking for people who HAVE implemented this. No offense, but it seems I am already at the same place that everyone else who has replied is. I know the codec and I know it needs tip and ring connectivity......mainly looking for anyone that HAS done this and how they dumbed it down so your typical front desk employee can educate a guest on how to use it.....ie if the ATA has to follow the device because as I mentioned this is an all IP hotel. There are no analog lines here.

 

[leejor]

Hopefully the rooms have an Ethernet jack or you will have to incorporate a wireless adapter with each of the ATAs issued to guests that require them. Have a couple of the units "ready to go" at the front desk and assign unique extension numbers to differentiate calls, in and out, from "normal" room extensions. Create outbound rules to allow calls from those extensions only to 711. Be certain that the ATAs are locked down to prevent any curious, tech savvy person, from accessing the settings. Some sort of deposit may also be advisable.

 

[cobaltit]

711 is mandated by the FCC. All SIP providers are required to support it.
I have numerous hotels, A LOT, that are analog and I use gateways and ATAs so yes testing is always crucial......in our business it is anyway for everything.

I am mainly looking for people who HAVE implemented this. No offense, but it seems I am already at the same place that everyone else who has replied is. I know the codec and I know it needs tip and ring connectivity......mainly looking for anyone that HAS done this and how they dumbed it down so your typical front desk employee can educate a guest on how to use it.....ie if the ATA has to follow the device because as I mentioned this is an all IP hotel. There are no analog lines here.

If your SOP is to test then no amount of affirmation here is a replacement for testing. Unless your provide the specific make/model of the teletype everything is just an educated guess. And even if someone had a working config it's really going to boil down to the SIP provider and network quality. I've had plenty of tried and true configs for fax that work in one setup and not another. Anaolg is just a crapshoot. If you can get your hands on a couple devices and try a couple ATAs that's your best bet. Or it appears there are SIP teletype machines that may make more sense.

For the ATA following the machine that's a e911 question not a 711 question but If your e911 is tied to a TN then you either need an ATA per room or to show staff how to provision the ATA. Neither option is ideal.

Best of luck, hope you can find a reasonable solution.

 

[leejor]

While this is applicable in the US, I'm sure that there is a move (slower in some areas), away from TTY, in most parts of the world.
https://www.federalregister.gov/doc...nsition-from-tty-to-real-time-text-technology