GSM WORLD

Hi All,

I am successfully using this phone as a dial-up modem with a laptop,
at 9.6k, dialling up a normal UK ISP (0845..).

However, the connection takes 45-60 secs to establish and most of this
is probably the modem negotiation time. I am sure the ISP starts off
at 56k...

Voice calls connect in about 5 seconds.

Can anyone suggest anything to cut down this connection time?
Historically, Hayes compatible modems had various AT commands to force
a connection only at a certain speed.

I cannot find the Hughes 7100 programming data anywhere. The network
is Thuraya.

Thank you in advance for any tips.

occassionally-confused@nospam.co.uk wrote:


Yes, you need to connect to a port of the ISP compatible with
V.110/ISDN. That will skip the modem training. Which ISP?

(I last tried this with a Nokia Communicator years ago - think my ISPs
modem banks didnt support it!)

See <http://mobileinternetguide.org/html/ch01s01s02.html>

Google v.110 isdn cbst for settings used on other phones, which might
be relevant? CBST is the AT command to change bearer service

--
Adrian C

wrote in message
news:b4na44997lljie1uejeo5ad9npjn8st8go@4ax.com...

You can cut out the attempts to train at 56k, but then you will be running
at lower speed.

R. Mark Clayton wrote


The actual data rate is only 1.3kbytes/sec max so no point in
connecting anything over 19200.

NTW I did another test today and a voice connection takes 25 secs so
maybe my 45 secs (which includes the ISP authentication) is not so
bad...

In article , occassionally-
confused@nospam.co.uk says...

AT commands ar standard accross all modems are they not? I remember
using a AT command to force a 28.8 connection using Orange a very long
time ago, but I can no way remember what it was, something AT+CBST=
28,0,0,1, ATDT[dial-up number] etc.
--
Regards
Jon

Peter wrote:

But could be zero :-)

Ask your ISP technical department about v.110. Their modem racks may
support it on the same dial-in number...

--
Adrian C

Adrian C wrote:


OK, Ive done more tests :)

Voice calls start to ring after 25 secs.

Watching the windoze dial-up dialogue carefully, I see the
authenticating message after about 25 secs too. One would not see
this if the modems were still negotiating, would one?

So I reckon the extra 20 secs are actually spent on authentication
(login/pwd) and of course DHCP.

I wonder if I can avoid the DHCP step. Can one connect a laptop with
some invented fixed private-range IP (say 192.168.1.1) directly to an
ISP? I realise I would have to also configure a nameserver IP for the
laptop to use.

One can get GPRS on Thuraya but only with the SG phones which have
fancy features, colour screens, and zero battery life.

Presumably, the billing on a voice call doesnt start until the
ringing starts, yes?

Another thing is this: there should be NO modem negotiation since the
calls is a DATA call. An old-style analog modem call is a VOICE call
and the modems negotiate the best speed on a VOICE line. Thats why
the negotiation is required. ISDN gets away from this and no
negotiation is involved. I am sure satellite DATA calls are like ISDN.

x----------x

occassionally-confused@nospam.co.uk wrote:

Think you are correct, the training is over by then. Ive never used a
satellite phone and am scarily wondering how much extra these seconds
would be costing you.


Its not DHCP on a PPP connection but something called IPCP (IP Control
Protocol). Still does the same thing for you, it hands you an IP address
for the connection which has to be within the ISPs chosen subnet of
user connections.

I wonder if I can avoid the DHCP step. Can one connect a laptop with

You could ask your ISP for a static IP address?


Hmmm... Id hope so, but no idea...


AIUI The information may reach across the GSM connection as DATA, but
the training actually is happening between the telephone networks
interface from GSM to analogue VOICE, and the other modem. Your handset
plays no part in this, it doesnt have the analogue trickery in it, but
for compatibility with the other end this must go on unless knobbled
with the ISDN setting.

Table of connection times over GSM for data traffic.
<http://www.tdc.co.uk/technical/downloads/faq/faq-05-01.pdf>

--
Adrian C