Grandstream HT502 - UK Vintage Radio Repair and Restoration Discussion Forum

Graham1 · 14th Dec 2016, 12:50 pm

Can anyone help with the setup for a BT phone to work with loop dial on a Grandstream HT502?

Thanks.

Dave Moll · 14th Dec 2016, 9:36 pm

I'll have a look in my Grandstream HT502 manual (downloaded some time back from t'internet) and see whether I can find anything.

Also, once I've remembered the password for my HT502 setup, I'll see whether there's anything obvious in the configuration details.

If at the end of the day I can't answer your question, I know a man who probably can. As he's a forum member, he may step in before I have an answer anyway!

WayneL74 · 14th Dec 2016, 11:45 pm

Hi Graham.

I have the "big brother" of your device - a GXW-4008. This runs the same firmware.

Have you got it working with a modern touch-tone phone but not a mechanical dial one?

These devices do support pulse dialling, but the pulse timing is much more strict than a BT line. If you are using a dial phone & it is not running at the correct speed, this could be the issue.

If you have a modern push-button phone you should be able to temporarily switch the phone to pulse dialling & you can test it is accepting pulse dialling.

If its another setup issue then let me know I as do know these models quite well.

Regards,

Wayne

julie_m · 15th Dec 2016, 2:13 am

I found the PDF instruction manual for the HT-502 online easily enough and had a good look at it, but could not find any mention of loop disconnect / pulse / rotary dialling anywhere. I guess if the unit supports LD at all, it probably will Just Work; and if it does not work, that probably means it does not support LD.

As an aside, I happen to know for a fact that the Digium TDM410P / E cards definitely support pulse dialling, because I am using one with a GPO model 746 telephone. I have then configured short codes in my Asterisk dialplan; including my parents' old 4-figure number in my old village, plus things like 829 = TAX for the nearest taxi firm, 737 = RFP for my local electronic components supplier, R. F. Potts of Derby and 846 = VINdaloo for the local curry house! Also 585 = JUK for a very simple MP3 juke box application I wrote as a proof-of-concept (entirely in dialplan language, no AGI script required).

Dave Moll · 15th Dec 2016, 7:28 am

I can confirm that the HT502 is supposed to support LD dialling. It is apparently one of its selling points. It's just that I've never made use of the feature.

Pellseinydd · 15th Dec 2016, 10:01 am

The manual or datasheets make no mention of 'loop dialling'. It is jut that some of us have the units set up and working with LD telephones on CNet - the Collectors Telephone network where we dial the old STD codes (Anyone can join and no line rental and calls are free! - I know as I administer it in the UK

). To my knowledge it 'loop dialling' is not an advertised feature of the Grandstream. I'm still working on find out exactly what settings affect the pulse dialling. Electronic pulse dialling phones will work with the right settings but rotary dials seem to be a lot more critical. I'll have a play this evening.

oldmoley1 · 15th Dec 2016, 12:44 pm

Hi Ian

On a related matter (sort of), I acquired a Grandstream 502 recently via the good services of Andrew Emmerson, and would like to get things linked up for CNET. I started this off some time ago, but then fell ill, so couldn't continue. Would it be OK to email you privately please?

Graham1 · 15th Dec 2016, 1:10 pm

Many thanks for all the Replies, I do have the HT502 working with MF and loop dial provided electronically. but with old telephones it will not work. Trying to adjust a dial to 10 & 66.6/33.3 without a tester is well? I was hoping to find some adjustment in the grandstream.

Pellseinydd · 15th Dec 2016, 2:59 pm

Quote:

Originally Posted by oldmoley1

On a related matter (sort of), I acquired a Grandstream 502 recently via the good services of Andrew Emmerson, and would like to get things linked up for CNET. I started this off some time ago, but then fell ill, so couldn't continue. Would it be OK to email you privately please?

No problem - just let me know the number you are after & I'll get it set up and send you the set up details. I assume you've got my email address?

oldmoley1 · 15th Dec 2016, 9:13 pm

Hi. I did have, but now can't find it. Could you remind me please?

dagskarlsen · 15th Dec 2016, 9:40 pm

Quote:

Originally Posted by Graham1

Many thanks for all the Replies, I do have the HT502 working with MF and loop dial provided electronically. but with old telephones it will not work. Trying to adjust a dial to 10 & 66.6/33.3 without a tester is well? I was hoping to find some adjustment in the grandstream.

You do not need much of a tool to scheck the dial speed and pulse ratio:
http://tinyurl.com/ho65stq

dsk

Nickthedentist · 16th Dec 2016, 11:49 am

Very clever, DSK, thanks for the link.

Graham1 · 17th Dec 2016, 12:22 pm

Thanks DSK for the link
Graham

14th Dec 2016, 12:50 pm	#1
Graham1 Retired Dormant Member Join Date: Jan 2014 Location: Kenilworth, Warwickshire, UK. Posts: 13	Grandstream HT502 Can anyone help with the setup for a BT phone to work with loop dial on a Grandstream HT502? Thanks.

14th Dec 2016, 9:36 pm	#2
Dave Moll Dekatron Join Date: Feb 2005 Location: West Cumbria (CA13), UK Posts: 6,127	Re: Grandstream HT502 I'll have a look in my Grandstream HT502 manual (downloaded some time back from t'internet) and see whether I can find anything. Also, once I've remembered the password for my HT502 setup, I'll see whether there's anything obvious in the configuration details. If at the end of the day I can't answer your question, I know a man who probably can. As he's a forum member, he may step in before I have an answer anyway! __________________ Mending is better than Ending (cf Brave New World by Aldous Huxley)

14th Dec 2016, 11:45 pm	#3
WayneL74 Triode Join Date: Jun 2015 Location: Ipswich, Suffolk, UK. Posts: 49	Re: Grandstream HT502 Hi Graham. I have the "big brother" of your device - a GXW-4008. This runs the same firmware. Have you got it working with a modern touch-tone phone but not a mechanical dial one? These devices do support pulse dialling, but the pulse timing is much more strict than a BT line. If you are using a dial phone & it is not running at the correct speed, this could be the issue. If you have a modern push-button phone you should be able to temporarily switch the phone to pulse dialling & you can test it is accepting pulse dialling. If its another setup issue then let me know I as do know these models quite well. Regards, Wayne

15th Dec 2016, 2:13 am	#4
julie_m Dekatron Join Date: May 2008 Location: Derby, UK. Posts: 7,735	Re: Grandstream HT502 I found the PDF instruction manual for the HT-502 online easily enough and had a good look at it, but could not find any mention of loop disconnect / pulse / rotary dialling anywhere. I guess if the unit supports LD at all, it probably will Just Work; and if it does not work, that probably means it does not support LD. As an aside, I happen to know for a fact that the Digium TDM410P / E cards definitely support pulse dialling, because I am using one with a GPO model 746 telephone. I have then configured short codes in my Asterisk dialplan; including my parents' old 4-figure number in my old village, plus things like 829 = TAX for the nearest taxi firm, 737 = RFP for my local electronic components supplier, R. F. Potts of Derby and 846 = VINdaloo for the local curry house! Also 585 = JUK for a very simple MP3 juke box application I wrote as a proof-of-concept (entirely in dialplan language, no AGI script required). __________________ If I have seen further than others, it is because I was standing on a pile of failed experiments.

15th Dec 2016, 7:28 am	#5
Dave Moll Dekatron Join Date: Feb 2005 Location: West Cumbria (CA13), UK Posts: 6,127	Re: Grandstream HT502 I can confirm that the HT502 is supposed to support LD dialling. It is apparently one of its selling points. It's just that I've never made use of the feature. __________________ Mending is better than Ending (cf Brave New World by Aldous Huxley)

15th Dec 2016, 10:01 am	#6
Pellseinydd Heptode Join Date: Jul 2007 Location: Flintshire, UK. Posts: 707	Re: Grandstream HT502 The manual or datasheets make no mention of 'loop dialling'. It is jut that some of us have the units set up and working with LD telephones on CNet - the Collectors Telephone network where we dial the old STD codes (Anyone can join and no line rental and calls are free! - I know as I administer it in the UK ). To my knowledge it 'loop dialling' is not an advertised feature of the Grandstream. I'm still working on find out exactly what settings affect the pulse dialling. Electronic pulse dialling phones will work with the right settings but rotary dials seem to be a lot more critical. I'll have a play this evening.

15th Dec 2016, 12:44 pm	#7
oldmoley1 Tetrode Join Date: Apr 2014 Location: Northampton, Northants, UK. Posts: 84	Re: Grandstream HT502 Hi Ian On a related matter (sort of), I acquired a Grandstream 502 recently via the good services of Andrew Emmerson, and would like to get things linked up for CNET. I started this off some time ago, but then fell ill, so couldn't continue. Would it be OK to email you privately please?

15th Dec 2016, 1:10 pm	#8
Graham1 Retired Dormant Member Join Date: Jan 2014 Location: Kenilworth, Warwickshire, UK. Posts: 13	Re: Grandstream HT502 Many thanks for all the Replies, I do have the HT502 working with MF and loop dial provided electronically. but with old telephones it will not work. Trying to adjust a dial to 10 & 66.6/33.3 without a tester is well? I was hoping to find some adjustment in the grandstream.

15th Dec 2016, 9:13 pm	#10
oldmoley1 Tetrode Join Date: Apr 2014 Location: Northampton, Northants, UK. Posts: 84	Re: Grandstream HT502 Hi. I did have, but now can't find it. Could you remind me please?

16th Dec 2016, 11:49 am	#12
Nickthedentist Dekatron Join Date: Jan 2005 Location: Oxford, UK. Posts: 17,846	Re: Grandstream HT502 Very clever, DSK, thanks for the link.

17th Dec 2016, 12:22 pm	#13
Graham1 Retired Dormant Member Join Date: Jan 2014 Location: Kenilworth, Warwickshire, UK. Posts: 13	Re: Grandstream HT502 Thanks DSK for the link Graham