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參數(shù)資料
| 型號(hào)： | XE0204 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 2-Wire/4-Wire Telephone Line Interface |
| 中文描述： | 2-Wire/4-Wire電話線接口 |
| 文件頁(yè)數(shù)： | 3/8頁(yè) |
| 文件大?。?/td> | 39K |
| 代理商： | XE0204 |
XECOM
(3)
XE0204
XE0204 Pin Configuration
Pin
Name
Description
1
VCC
VCC supplies +5 Volts power to the XE0204
3
/RI
Ring Indicate, output, active low, TTL. /RI indicates the XE0204 is receiving a ring signal. /RI remains
low for the duration of each ring.
4
RCVR
RCVR acts as the analog output for signals recevied from the telephone line by the XE0204. In two wire
mode the received signal is placed on RCVR by the 2-to-4 wire convertor. In four wire mode the
received signal comes directly from the receive phone line pair.
5
XMIT
XMIT provides the analog input to the XE0204 for signals to be transmitted onto the telephone line. In
two wire mode the signal is passed to the 2-to-4 wire convertor. In four wire mode the signal goes
directly the transmit phone line pair.
7
OH
Hookswitch relay control. A high on OH closes the internal relay and connects the equipment to the
telephone line. OH must be forced high to maintain a 2 wire or 4 wire leased line.
8
/4Wire
/4Wire is an active low input to the XE0204 which selects four wire operation. If pin 8 is open or driven
high, two wire mode is selected.
9
N/C
No Connection
10
Gnd
Gnd provides the ground reference connection to the XE0204.
11
RxRing
RxRing provides the Ring connection to the receive pair of the four wire phone line. RxRing is not used
for two wire connections. RxRing has 1500 volts isolation from the rest of the circuitry. This isolation
must be preserved throughout the system.
14
RxTip
RxTip provides the Tip Connection to the receive pair of the four wire phone line. RxTip is not used for
two wire connections. TxTip has 1500 volts isolation from the rest of the circuitry. This isolation must
be preserved throughout the system.
17
TxRing
TxRing provides the Ring Connection to two wire lines as well as to the transmit pair of four wire phone
lines. TxRing has 1500 volts isolation from the rest of the circuitry. This isolation must be preserved
throughout the system.
20
TxTip
TxTip provides the Tip Connection to two wire lines as well as to the transmit pair of four wire phone
lines. TxTip has 1500 volts isolation from the rest of the circuitry. This isolation must be preserved
throughout the system.
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