Nortel Meridian Meridian 1 Implementation Manual page 20

Page 20 of 208
Gateway slot in the Succession 1000). The MICB card has the following
hardware interface characteristics:
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553-3001-358 Standard 1.00
Uses the microprocessor unit (MPU) based on the 25MHz
MC68EN360 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.
Accesses all 32 DS-30X voice/signaling timeslots.
Provides echo cancelling and automatic gain control.
Supports both the A-law and the m-law signal coding/decoding.
Emulates an M2616 digital telephone set on each MICB port.
Supports Card-LAN interfaces.
Performs X12 signaling protocol messages for input/output.
Uses digital signal processor (DSP) for conferencing and DTMF
detection.
The DSP firmware:
— 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.
Provides self-tests of internal hardware components and allows
card monitoring and maintenance through the maintenance port;
provides enable/disable capabilities similar to existing system
cards.
Provides one RS-232 serial port for administration and maintenance
access.
Provides enhanced Call Detail Recording (CDR –
Succession 1000M, Succession 1000, and Meridian 1 only) and
billing options.
Provides an optional Ethernet interface over a Maintenance
interface.
October 2003