Help in identification please - UK Vintage Radio Repair and Restoration Discussion Forum

terrybull · 28th Apr 2011, 6:13 pm

A friend recently passed away and clearing a storeroom(s) he had I came accross these. I dare say they are dated now. What are they. Are they worth anything. Thanks

Cobaltblue · 28th Apr 2011, 8:30 pm

Hi Terry I used to maintain CRAYCOM kit in the 80's and early 90's. I think they were based in Frimley this was in X25 days. I might still have my hanbooks somewhere. I would doubt these have any value but you never know!

I cant quite see what sort of port these units have most of the ones I looked after were for Telephone and Mixed Data on 2.048MBPS pipes interfacing to PABX equipment they use quadruple compression to achieve 9.6K Audio channels just like a 2G mobile phone We often used to sit them on the end of Sprint TP4000 X25 switches. This was before Sprint which was in partnership with Plessey got taken over by Alcatel when Plessey got carved up by GEC and Siemens. A real Blast from the past for me!

Have fun Mike T

neon indicator · 28th Apr 2011, 8:57 pm

A kind of adaptor for multiple terminals on one connection. (simplified explanation)

Totally obsolete and worthless.

terrybull · 28th Apr 2011, 9:27 pm

For the skip then. Many thanks for your help. This can be close mod.

paulsherwin · 28th Apr 2011, 10:01 pm

They look like statistical multiplexers. If so, they were used to multiplex a number of RS232 connections over a single data cable or X25 circuit in the 80s.

They only have scrap value now, but they would make good project boxes and may have useful parts (mains transformers etc) inside. Worth having a look before you skip them.

julie_m · 29th Apr 2011, 4:45 am

Yes, there may be some useful parts in the PSU sections; and even those chassis are of a size that might come in handy to someone building a project.

terrybull · 29th Apr 2011, 1:33 pm

If anyone wants them you are welcome to them. Does this want moving to the offered section?

neon indicator · 29th Apr 2011, 4:20 pm

Quote:

Originally Posted by paulsherwin

They look like statistical multiplexers. If so, they were used to multiplex a number of RS232 connections over a single data cable or X25 circuit in the 80s.

They only have scrap value now, but they would make good project boxes and may have useful parts (mains transformers etc) inside. Worth having a look before you skip them.

Agree with all points.

paul.brett · 3rd May 2011, 1:57 pm

Are you going to the Spalding Radio Rally on 5th June? If you could bring them there, that would be great.

Thanks.

Paul.

28th Apr 2011, 6:13 pm	#1
terrybull Octode Join Date: Jan 2011 Location: Southwell, Nottinghamshire, UK. Posts: 1,781	Help in identification please A friend recently passed away and clearing a storeroom(s) he had I came accross these. I dare say they are dated now. What are they. Are they worth anything. Thanks Attached Thumbnails

28th Apr 2011, 8:30 pm	#2
Cobaltblue Moderator Join Date: Dec 2010 Location: Exeter, Devon and Poole, Dorset UK. Posts: 6,876	Re: Help in identification please Hi Terry I used to maintain CRAYCOM kit in the 80's and early 90's. I think they were based in Frimley this was in X25 days. I might still have my hanbooks somewhere. I would doubt these have any value but you never know! I cant quite see what sort of port these units have most of the ones I looked after were for Telephone and Mixed Data on 2.048MBPS pipes interfacing to PABX equipment they use quadruple compression to achieve 9.6K Audio channels just like a 2G mobile phone We often used to sit them on the end of Sprint TP4000 X25 switches. This was before Sprint which was in partnership with Plessey got taken over by Alcatel when Plessey got carved up by GEC and Siemens. A real Blast from the past for me! Have fun Mike T __________________ Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk

28th Apr 2011, 8:57 pm	#3
neon indicator Retired Dormant Member Join Date: Jun 2010 Location: Co. Limerick, Ireland. Posts: 1,183	Re: Help in identification please A kind of adaptor for multiple terminals on one connection. (simplified explanation) Totally obsolete and worthless.

28th Apr 2011, 9:27 pm	#4
terrybull Octode Join Date: Jan 2011 Location: Southwell, Nottinghamshire, UK. Posts: 1,781	Re: Help in identification please For the skip then. Many thanks for your help. This can be close mod.

28th Apr 2011, 10:01 pm	#5
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,966	Re: Help in identification please They look like statistical multiplexers. If so, they were used to multiplex a number of RS232 connections over a single data cable or X25 circuit in the 80s. They only have scrap value now, but they would make good project boxes and may have useful parts (mains transformers etc) inside. Worth having a look before you skip them.

29th Apr 2011, 4:45 am	#6
julie_m Dekatron Join Date: May 2008 Location: Derby, UK. Posts: 7,735	Re: Help in identification please Yes, there may be some useful parts in the PSU sections; and even those chassis are of a size that might come in handy to someone building a project. __________________ If I have seen further than others, it is because I was standing on a pile of failed experiments.

29th Apr 2011, 1:33 pm	#7
terrybull Octode Join Date: Jan 2011 Location: Southwell, Nottinghamshire, UK. Posts: 1,781	Re: Help in identification please If anyone wants them you are welcome to them. Does this want moving to the offered section?

3rd May 2011, 1:57 pm	#9
paul.brett Tetrode Join Date: Dec 2005 Location: Wisbech, Cambridgeshire, UK. Posts: 97	Re: Help in identification please Are you going to the Spalding Radio Rally on 5th June? If you could bring them there, that would be great. Thanks. Paul. __________________ My vintage Computer Museum. Please visit soon!