PEB24911HV13 Lantiq, PEB24911HV13 Datasheet - Page 98

• Manufacturer Part Number: PEB24911HV13
• Manufacturer: Lantiq

Specifications of PEB24911HV13

• Lead Free Status / Rohs Status: Supplier Unconfirmed

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4.4
This chapter summarizes all features provided by the DFE-Q V2.1 to support
maintenance functions and system measurements. Three main groups may be
distinguished:
– maintenance functions to close and open test loopbacks
– features facilitating the recognition of transmission errors
– test modes required for system measurements
The next sections describe how these test and maintenance functions are implemented
and used in applications.
4.4.1
Test loopbacks are specified by the national PTTs in order to facilitate the location of
defect systems. Four different loopbacks are defined. The position of each loopback is
illustrated in
•
Figure 37
Data Sheet
S-BUS
NT IOM
C/I DI
C/I DC
Layer-1 Controller
Layer-1 Controller
S-Transceiver
Maintenance and Test Functions
Test Loopbacks
Loop 2
Figure
Test Loopbacks
®
-2
PBX or TE
IOM
IOM
(1111
(1111
IOM-2
37.
NT
®
®
-2
-2
U-Transceiver
U-Transceiver
B
B
U-Transceiver
)
)
Loop 2
Loop 2
Loop 2
Loop 3
LT IOM
C/I UAI
[C/I DC
U
®
-2
U-Transceiver
Loop 1 A
(0111
(1111
88
Repeater
B
B
IOM
)
)]
®
(optional)
-2
–––––> ; S-interface is deactivated
<––––– ;
U-Transceiver
Exchange
control
Operational Description
U
U-Transceiver
Exchange
Loop 1
retains
PEF 24911
loop_2b1q.em f
IOM
2001-07-16
®
-2
no