Nortel Networks 555-4001-135 User Manual

Each ICB card occupies one slot in a Media Gateway chassis slot (CS 
1000) or an IPE shelf (Meridian 1/CS 1000/CS 2100/SL-100). ICB 
Release 4 is based on a new hardware platform. The ICB card has the 
following hardware interface characteristics:

•

uses the microprocessor unit (MPU) based on the 50MHz MPC 
860P Power Quad Integrated Communications Controller

•

uses standard interface buses and personal computer memory card 
international association (PCMCIA) cards and handles files that are 
compatible with MS-DOS operating system on the PCMCIA storage 
device and formatted with fat 16 file system. The fat 32 file system 
is not supported.

•

uses 4MB flash memory for boot purposes

•

accesses all 32 DS-30X voice/signaling timeslots

•

provides echo cancelling and volume control

•

users 128 KB SRAM memory for saving trap data during resets

•

emulates an M2616 digital telephone set on each ICB port

•

supports Card-LAN interfaces

•

performs X12 signaling protocol messages for input/output

•

uses digital signal processor (DSP) for conferencing and DTMF 
detection

•

provides the drivers for the new hardware through the MPU 
firmware 

•

The DSP firmware:

— Provides DTMF tone detection.

— Provides for A-law and u-law conversion.

— Provides the functionality for the conference bridge.

— Downloads the code from the MPU.

— Communicates with the MPU.

— Analyzes the loudness off all received signals continuously and 

selects the two loudest signals to be the active speakers.

— Handles two-way conversation in conferences with three to 62 

conferees.

— Normalizes the pulse code modulation (PCM) input samples.

— Provides gain control on all output samples.

— Provides software upgrades using a PCMCIA Flash card.