STLC5460

BOARD CONTROLLER FOR UP TO 16 ISDN LINES OR 16 VOICE SUBSCRIBERS.
TWO SERIAL INTERFACES :
   -PCM Four bidirectional multiplexes
   -GCI One (or two) at 2 Mb/s.
NON BLOCKING SWITCH FOR 128 CHANNELS (16, 32 OR 64 KB/S BANDWIDTH).
N CONSECUTIVE 64 kb/s CHANNELS FROM AN INPUT MULTIPLEX CAN BE SWITCHED AS A SINGLE N X 64 kbit/s CHANNEL TO AN OUTPUT MULTIPLEX AT 2048 kb/s.
TIME SLOT ASSIGNMENT FREELY PROGRAMMABLE FOR EVERY CONNECTED SUBSCRIBER.
PROGRAMMABLE PCM DATA RATES UP TO 8192 kb/s.CONSTANT DATA RATE AT 2 Mb/s ON GCI SIDE.
PCM interface :
   - Simple and double clock frequencyselectable;.
   - Programmable clock shift
   - Tristatemodecontrol signals forexternal drivers.
GCI interface :
   - Six bits or four bits Command/indicate channel selectable for analog or digital equipment
   - Command/IndicateMonitor channels validated or not
Microprocessor access to two selected bidirectional channels of GCI and/or PCM.
Multicontrollers for layer 1 functions :
   - C/I protocolcontroller for up to 16 C/I channels
   - Monitor protocol controller for up to 16 Monitor channels.
Standard microprocessor interface with multiplexed address/data bus or separate address data buses.
PLCC44 pins PACKAGE February 1997

The Line Card Interface Controller, STLC5460, is a monolithic switching device for the path control of up to 128 channels of 16, 32, 64 kbps bandwidth.Two consecutive 64 kbps channels may also be handled as a quasi single 128 kbps channel.For these channels, the LCIC performs nonblocking space time switching between two serial interfaces: the system interface (or PCM interface) and the general component interface (GCI).

PCM interface can be programmed to operate at different data rates between 2048 and 8192 kbps.The PCM interface consists of up to four duplex ports with a tristate indication signal for each output line. The STLC5460 interface can be selected to be PCM interface at 2Mbit/s.

The LCIC can be programmed to communicate with GCI compatible devices such as STLC3040 (SLIC), STLC5411 (U interface) and others. The STLC5460 manages the layer 1 protocol buffering the Command/Indicate and Monitor channels for GCI compatible devices.

Due to its capability to switch channels of different bandwidths, the STLC5460 can handle up to 16 ISDN subscribers with their 2B+D channel structure in GCI configuration, or up to 16 analog subscribers.Since its interfaces can operate at different data rates, the LCIC is an ideal device for data rate adaptation between PCM interface up to 8Mb/s and GCI at 2Mb/s.

The STLC5460 gives the possibility of checking the correct communication inside the PBX or Public Central Office providing :
- independentPCM delay setting
- PCM comparison function
-PseudoRandomSequenceGeneratorandAnalyser.
 
Moreover, the LCIC is one of the key building blocks for networks with either central, distributed or mixed signaling and packet data handling architectures associated with STLC5460 (HDLC controller).

The STLC5460 is controlled by a standard 8 bit parallel microprocessor interface with a multiplexed address-data bus. The device may optionally be controlled by separate address and data buses.