atcomsystems.ca/forum Forums General General Telephone & Systems Information digital vs analog

Hence, it isn't a digital phone. It's an Electronic Keyset telephone or EKT not a DKT (Digital Keyset Telephone).

They ALL convert digital or electronic to anolog at some point, phone or ksu, or all you'd hear is beepedy beep beep. It's just a matter of where that converson takes place. There are no purely anolog systems that I know of being made anymore. Bottom line, electronic or digital you program features and options, pure anolog you wire them.

Krane,

I just emailed you....check your email

Walter

Gkar said:
"Because I can put analog phones on the largest PBX in the world does that make it a analog switch like the Partner?"

I will say it again, Run away really fast from those people.

No it is still a digital switch but those ports are analog. And the digital phones you hook up to the digital ports are digital... Partner does not have digital ports for the sets nor does it have digital sets....So the partner system is not..... again is not a digital system.......
The talk path on a partner system is the wb/bw pair the data and power for the set is the wo/ow pair... If you have a talk path on a seperate pair of wires it is not a digital system... with a digital system you have a data stream on one pair.... There are digital systems that use a second pair to power the phones... but do not use it as a talk path. Above posts have already answered the question "which is better"

Walter
Valentine Systems
25 years in business and going strong...

I think some of you are saying the same thing in a different way.

Hybrid/EKT systems do use digital signalling for setup, features, lights, and buttons, but the voice stays analog on a separate pair from your mouth through the switch to another phone or CO line. They use (typically) the blue pair for voice and the orange pair for signalling. This can roughly be compared to a 1A2 system, where the line buttons and lights are controlled by different wires than the voice.

Digital/DKT systems convert your voice from analog to digital inside the phone and transmit it as digital from the phone through the switch to another digital phone, or convert back to analog in the CO card. Analog phones (2500 sets) on these systems connect to an analog card that does the analog to digital conversion on the card before going into the switch. They only use one pair from a digital phone to the switch.

Hope this helps.

I think that's the best explanation anybody's gonna get.

But like they've said, it doesn't matter. I actually like the partner and even the old Vodavi starplus systems better than some digital systems (norstar, DBS). Only analog system I've ever worked with that I didn't like was ExecuTech. That system was no more than a 1A2 system with a lot less wiring.

I still use EKT's on my Tadiran in my house for crying out loud. No one said they were bad, just they are what they are.

Hey HBiss, can you explain what you mean about analogue needing two pairs a haven't come across that before?. I work on both Siemens and Alcatel systems and it is all single pair, whether it is a digital line or analogue line coming out of the PBX.
Same as our POTS service here is single pair as well.

Analog uses one pair for voice, it will use a second pair for data and can use a 3rd pair for OHVA (off hook voice announce) and there's a few systems that use the 4th pair (Merlin Classic comes to mind) but I don't know what it's for.
Digital can sent all the above information on a single pair.

------------------
| Need a Telephone | Telephone Installers

I said that because that is usually the case as test-ok explains.

I'm not familiar with Siemens or Alcatel. Does a one pair (T/R?) analog set have all the functionality (such as line buttons etc) as the digital sets or are they basically single line sets with no line appearances and you use hook flash and dial codes? This is all I have ever seen.

-Hal