This reaches back twenty years and things change whether you're looking or not,
but:
DBP Telekom FTZ 19 Pfl 1 "Voltage Limits for 60 V Consumers in
Telecommunication Installations of the Federal German Post Office" (no date):
Normal range: -57.4 V to -67.7 V
Short duration: -50.0 V to -75.0 V
Austrian Telecommunications Authority Dbh VI 0128 "Requirements for Power
Systems using Cell Switching for 48/60 V Telecommunication Installations"
(1981):
60 V Normal range: 57.5 V to 63.0 V for
switching installations
51.0 V to
65.0 V for microwave systems
48 V Normal range: 44.0 V to 49.5 V
My recollection is that this existed mostly in the region along both sides of
the border of Germany and Austria, rather than Germany as a whole.
Peter Tarver
From: Kannan Dhamodaran [mailto:[email protected]]
Sent: Monday, August 14, 2017 21:36
To: [email protected]
Subject: Re: [PSES] -60Vdc Telecom supply voltage
Thank you Joe Randolph and Bostjan for your information.
I'm surprised many have not answered. Or maybe that's all the info available.
Once again thanks to everyone in the group.
Best regards,
Kannan
From: Joe Randolph [mailto:[email protected]]
Sent: Friday, August 11, 2017 9:22 PM
To: [email protected]<mailto:[email protected]>
Subject: Re: [PSES] -60Vdc Telecom supply voltage
Germany has historically been 60V, and I believe they still are.
Joe Randolph
Telecom Design Consultant
Randolph Telecom, Inc.
781-721-2848 (USA)
[email protected]<mailto:[email protected]>
http://www.randolph-telecom.com
From: Boštjan Glavič [mailto:[email protected]]
Sent: Thursday, August 10, 2017 11:43 PM
To: [email protected]<mailto:[email protected]>
Subject: Re: [PSES] -60Vdc Telecom supply voltage
Hello Kannan,
As far as I know it was used in Russia, however they switch now to 48VDC. In
deed there are many different systems and somewhere they might still use 60VDC.
Maybe also in some other ex-Soviet Union countries.
Best regards,
Bostjan
From: Kannan Dhamodaran [mailto:[email protected]]
Sent: Friday, August 11, 2017 5:10 AM
To: [email protected]<mailto:[email protected]>
Subject: [PSES] -60Vdc Telecom supply voltage
Dear valued members,
can you guide me on nations that uses -60Vdc supply for telecom installations?
Appreciate your valued inputs in advance.
Best regards,
Kannan
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