Prosody compact PCI installation guide
6
Tone generation and detection
• DTMF
detection
with zero talk-off
•
Call progress tone recognition
•
Universal tone generation and recognition (user programmable)
•
Support for pulse dial systems (<10pps)
• Fax
support
Matrix conferencing with echo suppression and noise gating
•
Matrix conferencing of up to 60 callers per DSP module
•
Many to one conferencing and one to many broadcasting
• Speaker
tracking
•
Gain control and noise/tone suppression of conference inputs
• Echo
Cancellation
Speech recognition
•
Speaker independent, isolated word recognition to interpret digits and a small number of
common words such as - yes, no, help etc.
The Prosody cPCI card provides an interface between the telephone network and a standard
Compact PCI
©
bus (including host storage devices). The Prosody cPCI card contains a digital
switch matrix that allows arbitrarily switched interconnection between the 4096 speech paths on
the H.110 CTBus. These speech paths can be switched through the signalling DSPs, Prosody
speech processing modules (including host storage devices) and the telephone network via four
E1/T1 ports.
1.3 Telephone
Network
Attachment
Each port on an Aculab E1/T1 cPCI card, fitted with revision 2
E1/T1
PM 4 line interface
modules, attaches to either an E1 (2Mbit) or T1 (1.544Mbit) digital system. It is available with 4
or 8 primary rate ports and subject to each port configuration may make or receive between 92
and 240 separate calls at a time. Each individual ports driver is software configurable for either
T1 or E1 (75 or 120 Ohms).
An E1 port attaches to the 2Mbit digital system or Primary Rate (2.048 Mbit/s) Integrated Services
Digital Network (ISDN). Network attachment is via a service provision often used to connect
digital PBXs to the telephone network (NT1). Each E1 primary rate ISDN ports may make or
receive 30 separate calls at a time.
A T1 port attaches to the 1.544Mbit digital system via a Channel Service Unit (FCC, IC or UL
Listed CSU). Each T1 ports may make or receive 23/24* separate calls at a time.
* T1 capacity is signalling system dependent.
CAUTION
When making a network connection, to reduce the risk of fire, only telecommunications line cord of 26 AWG or larger may be used.
Please refer to the appendices for details of the specific international connections.
international connections.
1.4
75 ohm network connection
•
Different impedance can be supported on the same E1 variant module;
•
The revision 2 module can simultaneously support both E1 and T1 ports.
•
Besides E1 and T1 ports requiring different firmware, E1 firmware also needs to support both
75 and 120ohms.
The default impedance is 120 ohms, changing the impedance to 75ohms is achieved through
changes to the firmware/firmware switches. For example, ETS300 firmware uses a switch
–s61,1
for 75ohms, but E1 DASS requires the firmware DASS75. Refer to the Call, Switch and Speech
Driver Installation Guide for further details
To connect to 75ohm E1 networks, RJ45 to BNC adapters are needed. The correct configuration
of these adapters is as follows:
