ADC ICX-250 User Manual page 57

54 ICX-250 Diagnostics
T1 Interface - T1 Loopback (
ICX-250 - Front Panel
ICX-250
T1 Loop
Net. Off Lcl.
NETWORK
Description: This is a three position slide switch used to operate the T1 Interface Loopback.
Factory Setting: OFF
Network: Loops signal back to the network and breaks the transmit and receive paths between the
Framer and LIU and Loops the T1 receive onto the T1 transmit within the Framer chip.
Local: Loops signal back to the network and breaks the transmit and receive paths between the
LIU and the line and loops the T1 transmit signal onto the T1 receive within the LIU.
ADCP-62-023
)
Slide switch - front
Off / QRSS 1 / Off / 2
T1 Loop Data Loop 1 Data Loop 2
Net. / Off / Lcl. Lcl. / Off / Net. Lcl. / Off / Net.
T1 Loop
Net. Off Lcl.
LOCAL
Note: When operating the QRSS switch the
T1 Loopback switch will be inoperative.
Testing
FXS Status Channel
1 3 5 7 9 11 13 15 17 19 21 23
2 4 6 8 10 12 14 16 18 20 22 24
T1 Loop
Net. Off Lcl.
OFF
11279-A
Issue 1, September 1998
© 1998, ADC Telecommunications, Inc.