US phone wire vs HK phone wire

  • Thread starter Thread starter Man-wai Chang ToDie (33.6k)
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Man-wai Chang ToDie (33.6k)

I bought a US Robotics 5637 USB modem. But I could not get it connected
with Hong Kong's phone network. It kept saying "NO DIALTONE".

DO I need a custom wire? How should I make it?

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I bought a US Robotics 5637 USB modem. But I could not get it connected
with Hong Kong's phone network. It kept saying "NO DIALTONE".

DO I need a custom wire? How should I make it?
Click to expand...

I assume you bought something compatible with the HK network. If you
bought something for another country, it may not work, as the call-
progress tones vary from place to place around the world.

http://en.wikipedia.org/wiki/Call-progress_tone
 
I assume you bought something compatible with the HK network. If you
bought something for another country, it may not work, as the call-
progress tones vary from place to place around the world.
http://en.wikipedia.org/wiki/Call-progress_tone
Click to expand...

Before I bought this USB modem (5637), I bought another PCI modem
(5610C) from US Robotics as well. 5610C worked fine with HK telephone
wire without issues. SO I assumed 5637 would do the same and asked my
cousin to buy it for me.

If it's a progress tone issue, I supposed there is a AT command to fix
it, right? I have never needed that, even in the old days when dial-up
modem was big business....

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@~@ Might, Courage, Vision, SINCERITY.
/ v \ Simplicity is Beauty! May the Force and Farce be with you!
/( _ )\ (Xubuntu 8.04.1) Linux 2.6.26.6
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http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa
 
Man-wai Chang ToDie (33.6k) said:
I bought a US Robotics 5637 USB modem. But I could not get it connected
with Hong Kong's phone network. It kept saying "NO DIALTONE".

DO I need a custom wire? How should I make it?
Click to expand...

Wikipedia has some info.

http://en.wikipedia.org/wiki/RJ11

The RJ11 connector, has a total of six pins. For ordinary phone use, the
center two pins are the Tip and Ring signals. I just looked at my USR modem,
and the RJ11 cable has the central two pins equipped and no others.

Hong Kong shows here, to use British BS 6312 or more recently, RJ11.

http://en.wikipedia.org/wiki/Telephone_plug

"Hong Kong RJ11 in newer installations, or BS 6312"

The BS 6312 is shown here. This article mentions that
typically pin 2 and 5 are needed. Maybe if your wall outlet
is RJ-11, something similar is done ?

http://en.wikipedia.org/wiki/BS_6312

So that means your Hong Kong outlet, probably
has the two signals needed on different pins than
the modem uses.

What standard does the modem follow ? Is it a North
American modem, or is it from some other country ?
Do you know for sure it is compatible with your
phone system ?

Paul
 
What standard does the modem follow ? Is it a North
American modem, or is it from some other country ?
Do you know for sure it is compatible with your
phone system ?
Click to expand...

I have no idea. The modem is US Robotics 5637 USB. Your help would be
very appreciated.

I did try the 2 pin in the center cable. The modem just replied "NO
DIALTONE".

--
@~@ Might, Courage, Vision, SINCERITY.
/ v \ Simplicity is Beauty! May the Force and Farce be with you!
/( _ )\ (Xubuntu 8.04.1) Linux 2.6.26.6
^ ^ 21:54:01 up 5:56 0 users load average: 1.00 1.01 1.06
¤£­É¶U! ¤£¶BÄF! ¤£´©¥æ! ¤£¥´¥æ! ¤£¥´§T! ¤£¦Û±þ! ½Ð¦Ò¼{ºî´© (CSSA):
http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa
 
I bought a US Robotics 5637 USB modem. But I could not get it connected
with Hong Kong's phone network. It kept saying "NO DIALTONE".

DO I need a custom wire? How should I make it?
Click to expand...

If you can hear a dialtone, but the modem is not "hearing" it, then
you may be able to "blind dial" by adding X2 to Dialup Networking's
Extra Settings, or wherever your OS allows.

To verify that your hardware is OK, you can measure the voltages at
the phone socket on your wall, first with the modem disconnected, then
connected but on-kook, and finally connected but off-hook.

In my locale the open-circuit voltage between tip and ring terminals
is 52VDC. This should not change significantly when the modem is
on-hook, but may drop as low as 10V or less when the modem makes a
call.

You can also listen for the dialtone on your modem's or PC's speaker
by adding M2L3 to DUN's Extra Settings.

M2 = speaker always on
L3 = max volume

- Franc Zabkar
 
I have no idea. The modem is US Robotics 5637 USB. Your help would be
very appreciated.

I did try the 2 pin in the center cable. The modem just replied "NO
DIALTONE".
Click to expand...

Modem phone leads and telephone phone leads are wired differently,
though they look the same. (In UK at least.) It may be that you have
the wrong type of lead.

I've also come across the odd dialup modem that wont work with a
standard lead, and the solution was to use a lead that had all 4
connectors in it (many only have 2), cut the lead in half and connect
the 2 halves up in whatever way makes the puter get the signal.
There's no point getting connection diagrams, just connect em up until
it runs. You can't do any harm this way - unless you get yourself
connected to it when someone tries ringing you :)

Insulate the joint properly afterwards, there are some situations in
which it can be dangerous.


NT
 
I bought a US Robotics 5637 USB modem. But I could not get it connected
with Hong Kong's phone network. It kept saying "NO DIALTONE".

DO I need a custom wire? How should I make it?
Click to expand...

I don't think you need a custom wire.

I remember I had a very similar problem to yours when I bought a cheap
USB 56K modem on a trip to Japan many years ago. The modem would return
a NO DIALTONE status because the dial tone frequencies used in Australia
were different from those in Japan.

I worked around it by using one of the extended result code commands. I
used the X1 command to force the modem into ignoring the wrong dial tone
so it would blind dial. It worked fine then.
 
I don't think you need a custom wire.

I remember I had a very similar problem to yours when I bought a cheap
USB 56K modem on a trip to Japan many years ago.  The modem would return
a NO DIALTONE status because the dial tone frequencies used in Australia
were different from those in Japan.

I worked around it by using one of the extended result code commands. I
used the X1 command to force the modem into ignoring the wrong dial tone
so it would blind dial. It worked fine then.
Click to expand...

IIRC that option can easily be set in win98, so probably also winME


NT
 
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