Electra Elite IPK II
Document Revision 3
System Hardware Manual
6 - 51
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5.9.3
Switch Settings
Refer to
Table 6-19 DTI-U40 Default Switch Settings
.
Table 6-19 DTI-U40 Default Switch Settings
Switch
Setting
Description
SW1–1
ON: Use channel indication by
LEDs 1~8
OFF: Line State indication by
LEDs 1~8 (Default)
Used to assign LED
Indications
SW1–2
SW1–3
When SW1-1 is ON:
SW1-2SW1-3
ON
ON
Not Applicable
OFF
OFF
CH1~ CH8 indication
(Default)
ON
Used
ON
OFF
CH9~ CH16 indication
ON
Used
OFF ON
CH17~ CH24 indication
ON
Used
SW1-4
ON: DS-1 Mode (T1 with CSU Function; external CSU not
required)
OFF: DSX-1 Mode (T1 without CSU Function; external CSU
required)
When the system is connected behind an external Channel
Service Unit (CSU), this switch must be ON.
DSX-1 interfaces T1 between the PBX and CSU.
Digital Signal Crossconnect Level 1 (DS-1)
interfaces T1 between the PBX and network with no
CSU (CSU less). Both are standard interfaces
accepted by Telco. Both have the same electrical
characteristics recommended by EIA/TIA 464, but
DSX-1 is preferred because most PBXs have a
CSU/DSU (DSX-1 interface) installed at the
customer site for T1 line protection and ease of
measurements and troubleshooting.
SW1-4 only applies to T1(SW3-1 is on). When the
PRI mode (SW3-1 is off), SW1-4 does not apply and
should be off. See program 10-03-12 for similar
setting for PRI.
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