Raisecom
RC3000-15 (P100R001) Hardware Description
8 Voice cards
Raisecom Proprietary and Confidential
Copyright © Raisecom Technology Co., Ltd.
96
8.5 12MT
8.5.1 Functions and appearance
Panel
Function
The 12MT is a 12-way magneto telephone access card. It provides the
following functions:
Provide 12 magneto telephone interfaces.
Support configurable gain:
–
The Rx A/D gain ranges from -23 to +2 dB, and is 0 dB by default.
–
The Tx D/A gain ranges from -17 to +8 dB, and is -3.5 dB by
default.
Support configuring signaling mode through software:
–
Support original signaling and reverse signaling. By default, it is
original signaling.
–
Support signaling occupation a-bit and b-bit. By default, it is a-bit.
Support configuring signaling mode (original signaling and reverse
signaling).
Support overcurrent protection for voice interfaces and ringing output.
Support online software upgrade.
Avoid short circuit when the 12MT card is running. If short
circuit occurs and ringing lasts 10 minutes, the 12MT card will
be damaged.