NEC 2400 ipx User Manual Page 494

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CHAPTER 3 NDA-24296
Page 468
Revision 1.0
PA-24CCTA
Common Channel Trunk
5. Switch Settings
Standard settings of switches on this circuit card are shown in the table below.
Figure 3-139 Available Locations for Loopback Testing
SWITCH
SWITCH
NO.
SETTING
STANDARD
SETTING
MEANING
SW00/MB
UP Circuit card make busy
DOWN
×
Circuit card make busy cancel
SW01/13B
0
ON
OFF
×
1
ON
OFF
×
2
ON
OFF
×
3
ON
OFF
×
Note: For more information on loopback, see below.
SW01/SW13B
Internal
Loopback
CCH
Control
MBR
CCH
Loopback
03
ON ON —— ×
OFF ON ×
ON OFF × ——
OFF OFF ———
SW01/SW13B
External
Loopback
Payload
Loopback
All Circuit
MBR
12
ON ON —— ×
OFF ON ×
ON OFF × ——
OFF OFF ———
Switch
TSW Interface
PAD
Speech Path
Control Block
Framer
Line Interface
NETWORK
External Loopback
(Line Loopback)
Payload Loopback
Internal Loopback
PA-24CCTA
R
T
As illustrated below, loopback testing can be performed at three locations on this card.
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