what is GSM directory

Archived from groups: alt.cellular.gsm (More info?)

On 31 May 2005 02:44:45 -0700, "dd" <duttdharm@yahoo.com> wrote:

>Hello,
>When I make a call from any PSTN phone, how does network know that the
>call is to be routed to a mobile station?
>I think the information is stored in MSISDN and IMSI. But I am not very
>clear how the information is decoded. Like how many digits are used for
>Country code and how many digits are used for Mobile Country Code. How
>is the HLR identified?


Incoming calls to a Mobile Station:

The call goes from the PSTN to a Gateway MSC (GMSC) belonging to the
subscriber's mobile carrier.

The GMSC uses MAP to query the appropriate HLR (based on the
subscriber's MSISDN) for the subscribers current location (VLR).

The GMSC then sends a MAP query to that VLR requesting a MSRN
(temporary routing number). The MSRN is used to route the call from
the GMSC through the PSTN to the serving MSC/VLR. (e.g. using ISUP)

The GMSC then sets up a call to that MSRN. The serving MSC/VLR will
then start paging the mobile station associated with the MSRN. The
MSRN is released back into the pool for other incoming calls.


Voila!

--
alistair

Archived from groups: alt.cellular.gsm (More info?)

On 3 Jun 2005 01:20:58 -0700, "dd" <duttdharm@yahoo.com> wrote:

>Hello,
>Thanks for the information. Can you please kindly inform if there is
>any link where I can find this information in more details
>Thank you
>with warm regards,
>DD


Try this:
<http://www.eventhelix.com/RealtimeMantra/Telecom/>

--
alistair