User's Manual

1-54
Lucent Technologies – Proprietary
See notice on first page
401-703-454
FOA Draft Issue 1
January, 2006
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Overview of the Flexent‚ Modular Cell 4.0B cabinet
installation
Completing landline
initiated calls
When a landline to mobile call is initiated, call signaling from the
PSTN, containing the mobile directory number, is sent the DCS. The
call signaling is registered by the ECP via the AP interface. The ECP
converted the mobile directory number to its associated electronic
mobile serial number. Not knowing where the mobile user is, the
mobile serial number is transferred via the AP interface to the DCS and
is sent out to all the base stations via a control DS0 time slot on the T1/
E1 lines. As a result, each base station will broadcast the mobile serial
number over a paging channel. The paging channel is a pre-assigned
channel broadcast over each sector in the base station domain. When
the target mobile identifies its serial number on the paging channel, it
will transmit a response to acknowledge the page. The response is sent
to the base station and sector that are in close proximity to the mobile.
The base station receiving this response, then sends the page
acknowledgement to its associated RCS, indicating that the call may be
forward to the targeted mobile. Subsequently, the RCS generates the
appropriated signals causing the DCS to route the call traffic from the
PTSN to the base station to acknowledged the page. The call traffic is
routed on an available DS0 time slot on one of the E1/T1 lines going to
the base station. At this time, the base station establishes a duplex RF
channel with the targeted mobile to complete the call.
Completing mobile initiated
calls
If a call is initiated by a mobile user, when the send button on the
mobile is activated, the call directory number entered by the mobile
user is transmitted to the base station sector closest to the mobile. The
base station then sends the directory number to the MSC via the control
DS0 slot on its T1/E1 line. If the directory number is associated with a
landline telephone, the number is routed to the PSTN to complete the
call, and an RF channel is allotted to handle the call traffic. If the
directory number is associated with another mobile within the cellular
service provider network, the directory number is converted to its
associated mobile serial number by ECP. As a result, the serial number
is broadcast over the paging channels in the service provider network.
If the location of the terminal mobile is unknown, the serial number is
routed to other DCSs in the service provider network to widen the page
coverage. When the landline phone or terminal mobile is answered, the
call is registered in the ECP. At this time, the allotted RF channel is
activated, and the DCS is configured by the RCS to route the call traffic
between the base station were the call was initiated, and the telephone
or mobile where the call is terminated. When the call is terminated to
an in-network mobile, the call traffic is routed directly between the
DCS where the call is initiated to the DCS where the call is terminated.