PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 180

• Manufacturer Part Number: PEB2085
• Description: ISDN SubscribernAccess Controller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

3.3.2.3
Table 15
Commands and Indications NT
Command (downstream)
Deactivate request
Resynchronization downstream
Activate request downstream
Activate request loop
Deactivate indication
downstream
Activate indication downstream
Activate indication loop
Send single zeros
Indication (upstream)
Timing
Lost signal level
Lost framing upstream
Error indication
Activate request upstream
Activate indication upstream
Deactivate indication
upstream
(x) unconditional commands
Semiconductor Group
Layer-1 Command/Indication Codes and State Diagrams in NT Mode
Abbr. Code
DR
RSYD 0100
ARD
ARL
DID
AID
AIL
SSZ
Abbr. Code
TIM
LSL
RSYU 0100
EI
ARU
AIU
DIU
0000
1000
1111
1100
1110
0010
0000
0001
0110
1000
1111
1010
1100
180
Remarks
(x)
Transmission of pseudo-ternary pulses at
96 kHz frequency after loss of
synchronism of the U interface
Transmission of info 2
Transmission of info 2, switching of test
loop 2
Deactivation acknowledgement,
quiescent state
Transmission of info 4
Transmission of info 4,
switching of test loop 2
Transmission of pseudo-ternary pulses at
2-kHz frequency (x)
Remarks
Clocks are required
No receive level
Receiver is not synchronous
RST and SCZ both active
Info 1 received
Synchronous receiver
Timer (32 ms) expired or info 0 received
(during 16 ms) after deactivation request
Operational Description