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PDF XE0046 Data sheet ( Hoja de datos )

Número de pieza XE0046
Descripción High-Performance Quad DAA Module
Fabricantes Xecom 
Logotipo Xecom Logotipo



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XE0046
02/98
High-Performance Quad DAA Module
Description
Xecom created the XE0046 for high-performance,
multi-line applications. The XE0046 integrates
four high performance DAA's into a single
compact module. Each DAA circuit operates
independently of all the others.
Like all of Xecom's DAA modules, the XE00046
integrates a Ring Detect Circuit, Loop Current
Holding Circuit, Solid-State Hookswitch, and
Telephone Line Transformer for each line. The
XE0046 also provides each line with a path for
the Caller ID signal from the telephone network
and a two-to-four wire convertor. The two-to-four
wire convertor separates the receive signal from
the transmit signal.
Below is a list of the special features incorporated
into the XE0046 for high-performance, multi-line
applications.
XE0046 Features
* Four Individual DAA's in a Single Package;
* Each DAA supports 33,600 bps data transfer;
* Each DAA provides a path for the Caller ID
signal from the phone company central office;
* Each DAA includes a 2/4 four wire convertor;
* Each DAA passes network signaling up to 0
dBm without distortion.
* Small Size: 2.5 inches long, 1.5 inches wide,
and 0.6 inches high;
* FCC Part 68 Compliant;
* Individual Ring Detection for each line;
* Each DAA integrates a Low-Distortion
Telephone Line Transformer;
* Each DAA provides a1500 volts isolation
between the phone line and all other circuits;
* Solid-State Hookswitch Control for each line;
XE0046 Block Diagram (This Block Diagram represents each DAA within the XE0046)
TX 2/4 Wire
Convertor
RX
Caller ID
Line
Transformer
Line Current
Holding
Circuit
Tip
Ring
OH Hookswitch
RI
XECOM
Ring
Detector
XE0046

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XE0046 pdf
Telephone Line Connection Information
When developing a product to be connected to the telephone line, it is necessary to use a circuit described as a
Data Access Arrangement (DAA) which is approved by the appropriate governmental agency. In the US, for
example, this agency is the Federal Communications Commission (FCC), while in Canada it is Industry Canada.
These agencies test and approve the product to ensure that it meets their specifications, thereby protecting the
telephone system from damage and protecting the user from high voltage transients (such as lightning strikes) which
may come down the telephone line.
The XE0046 has been designed to meet FCC Part 68 requirements for hazardous voltage, surge protection and
leakage current. If the system transmits data, or DTMF tones on the telephone line, the user must certify that these
transmitted signals meet FCC requirements for maximum transmission levels of out of band energy and billing delay.
Full details may be obtained from the FCC under Part 68 of the FCC Rules and Regulations, or in Title 47 of the
Code of Federal Regulations, however the basic requirements are as follows:
1. Maximum Transmit Level
For the normal “permissive” (standard) telephone line, equipment which transmits data (such as a modem) must not
exceed a transmission level of -9 dBm.
2. Out of Band Energy
Data equipment must not transmit “out of band” energy on the telephone line which exceeds the following limits:
Frequency
Range Max. Power
200Hz
to 3990Hz -9 dBm
3990Hz to 4005Hz -27 dBm
4005Hz to 16kHz -16 dBm
8kHz
to 94kHz -47 dBm
86kHz
to 270kHz -46 dBm
270kHz to 6MHz
-6 dBm
3. DTMF Transmission Level
If the system is capable of DTMF dialing, the maximum DTMF transmission level must be less than 0 dBm averaged
over a 3 second interval.
4. Billing Delay
A delay of 2 seconds or greater is required after the time the XE0046 is taken “off hook” and before any information
is transmitted. This is required to ensure that billing information may be exchanged between telephone company
central offices without interference.
The user of the XE0046 must certify to the FCC that the final system meets the requirements of Part 68 which
include the criteria above as well as the high voltage isolation provided by the XE0046. This is generally
accomplished through an independent testing lab which test the System and submits the proper paperwork to the
FCC for approval. Since the XE0046 already complies with FCC Part 68 rules, this is a relatively simple process.
XECOM (5) XE0046

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