PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 192

• Manufacturer Part Number: PEF2091
• Description: ICs for Communications(ISDN Echocancellation Circuit)
• Manufacturer: Siemens Semiconductor Group

Semiconductor Group
Codes Used in EOC Auto Modes for Complete Loop-Backs
If the complete loop should be closed outside the IEC-Q, the following code is applied.
Initialization (LT side)
Acknowledgment (issued on LT and NT side)
If the complete loop should be closed inside the IEC-Q, the following code is applied.
Initialization (LT side)
Acknowledgment (issued on LT and NT side)
Close loop in IEC-Q (NT side)
Codes Used in EOC Transparent Modes for Partial Loop-Backs
Single-channel and complete loop-backs are closed from the NT side with the
MON-8-commands.
0
0
0
0
1
MON-0
MON-0
MON-0
MON-0
MON-8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
LBBD
LBBD
LBBD
LBBD
LBBD
0
0
0
0
0
1
1
1
1
0
192
Close loop-back 2B + D
Close loop-back 2B + D
Close loop-back 2B + D
Close loop-back 2B + D
Close loop-back 2B + D
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
Operational Description
1
1
1
1
1
0
0
0
0
0
Data Sheet 01.99
0
0
0
0
0
PEB 2091
PEF 2091
0
0
0
0
0
0
0
0
0
1