ds2149qt-r Maxim Integrated Products, Inc., ds2149qt-r Datasheet - Page 19

• Manufacturer Part Number: ds2149qt-r
• Description: Ds2149 5v T1/j1 Line Interface Unit
• Manufacturer: Maxim Integrated Products, Inc.

Table 9-B. Control and Operation Mode Selection
10. DIAGNOSTIC MODE OPERATION
The DS2149 offers several diagnostic modes as listed in
available in software mode. In hardware mode, the diagnostic modes are selected by a combination of pin
settings. In software mode, the diagnostic modes are selected by setting appropriate bits in the diagnostic
control register.
Table 10-A. Diagnostic Modes
Local Loopback (LLB)
Analog Loopback (ALB)
Remote Loopback (RLB)
In-Band Network Loopback (NLB)
Dual Loopback (DLOOP)
Transmit AIS (TAIS)
Quasirandom Signal Source (QRSS)
In-Band Loop-Up/Down Code Generator
Bipolar Violation Insertion (INSBPV)
Logic Error Insertion (INSLER)
Bipolar Violation Detection (BPV)
Logic Error Detection, QRSS (QPD)
Receive Carrier Loss (RCL) Monitoring
Receive Alarm Indication Signal (AIS) Monitoring
Transmit Driver Failure Monitoring (DFMO)
Jitter Attenuator Limit Trip (JALT)
Receive Line Attenuation Indicator (LATN)
MODE1 MODE0
Open
Open
Open
High
High
High
Low
Low
Low
DIAGNOSTIC MODE
Open
Open
Open
High
High
High
Low
Low
Low
HARDWARE SOFTWARE NRZ BIPOLAR AMI B8ZS
Off
Off
Off
On
On
On
On
On
On
Internal Data Pattern Generation and Detection
Error Insertion and Detection
Alarm Condition Monitoring
Other Diagnostic Reports
Off
Off
Off
Off
Off
Off
On
On
On
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HARDWARE
Off
Off
On
On
On
On
X
X
X
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
No
No
No
AVAILABILITY
Table
Off
Off
Off
Off
On
On
X
X
X
10-A. Various diagnostic modes are only
SOFTWARE
Off
Off
Off
Off
Off
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
On
Yes
Yes
Yes
Yes
Yes
X
X
X
Off
Off
Off
On
On
On
X
X
X
SOFTWARE MODE
DISABLED
OUTPUTS
MASKABLE
Yes
Yes
Yes
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No