CHAPTER 3 NDA-24296
Page 596
Revision 1.0
PA -2 4 D TR ( D TI)
Digital T runk Interface
5. Switch Settings
Standard settings of switches on this circuit card a re shown in the table below.
Note: This switch setting is appli cabl e for a system adopts Associated Channel Interoffice Signalling (ACIS).
Figure 3-187 Available Locatio ns for Loopback Testing
SWITCH
NAME SWITCH
NO. SETTING STANDARD
SETTING MEANING
SW00
(MB) UP Circuit card make busy
DOWN ¥Circuit card make busy c ancel
SW01/13B 0ON Internal Loopback : Set
OFF ¥Internal Loopback : Cancel
1ON External Loopback : Set
OFF ¥Externa l Loopback : Cancel
2ON Payload Loopback : Set
OFF ¥Payload Loopback : Cancel
3ON All Channel Make Busy : Set Note
OFF ¥All Channel Make Busy : Cancel
Switch
TDSW Interface
PAD
Speech Path
Control Block
Framer
Line Interface
DIGITAL
NETWORK
External Loopback
(Line Loopback)
Payload Loopback
Internal Loopback
R
T
Speech Path
PA-24 DTR (DTI)

As illustrated below, loopback testing can be performed at three locations on this card by key setting of the

SW01/13B.