XE0002D Cermetek Microelectronics, XE0002D Datasheet - Page 6

• Manufacturer Part Number: XE0002D
• Manufacturer: Cermetek Microelectronics

Specifications of XE0002D

• Lead Free Status / RoHS Status: Supplier Unconfirmed

XE0002D FCC Instructions
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 the
Department of Communications (DOC). 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 XE0002D has been designed to meet all FCC Part 68 requirements for hazardous voltage, surge
protection and leakage current. If the system developed transmits data, or DTMF tones on the telephone
line, the user must certify that the signals transmitted meet basic FCC requirements for maximum
transmission levels, 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:
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 XE0002D 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 XE0002D 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 protection provided by the XE0002D. This is
generally accomplished through an independent testing lab which tests the System and submits the proper
paperwork to the FCC for approval. Since the XE0002D already complies with FCC Part 68 rules, this is a
relatively simple process.
XECOM
Frequency
200Hz
3990Hz
4005Hz
8kHz
86kHz
270kHz
to
to
to
to
to
to
Range
3990Hz
4005Hz
16kHz
94kHz
270kHz
6MHz
(6)
Max. Power
-9 dBm
-27 dBm
-16 dBm
-47 dBm
-46 dBm
-6 dBm
XE0002D