Specifications

Base Site Controller
iDEN® System
2-20 68P81095E55-E August 08, 2000
Mobile Switching Center
The Mobile Switching Center (MSC) is a GSM-based Mobile Telephone Switch
which provides Interconnect services. The MSC provides the interface between the
mobile network and other service provider’s PSTNs.
Physical Components
The MSC is a variation of the Nortel DMS switch family. The implementation of
this equipment is a coordinated effort between the provider, Motorola and Nortel.
The MSC is detailed in the manufacturer’s documentation. This equipment may be
configured and upgraded according to capacity and outgrowth requirements. The
MSC is available in three sizes:
• DMS-MSC Supernode
• SuperNode Size Enhanced (SNSE)
• MicroNode
In general, all versions of the MSC (Figure 2-12) consists of:
• Facilities Interface
• Switch Matrix
• Core Processor
• Signalling Interface
• Home Location Register
• Visited Location Register
Each of these components is discussed individually.
Figure 2-12 Mobile Switching Center Components
Digital
Trunk
Controller
(DTC)
(terminates
facilites for
switch)
Core
Proccessor
(Switch
Control)
VLR
(User activitiy,
location,
access &
services
profile)
Link
Peripherial
Processor
(LLP)
Signalling
conversion
MSC
Cross-Connect
Switch
Signalling
Signalling
HLR
User database
(May be remote)
Signaling
Signaling
DS0's
Signaling
60K
spans
Max.
Uses E1
interface
DS0's
DS30's
T1
E1
T1
PSTN
BSC
T. N. French