PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 11

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

List of Figures
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Semiconductor Group
C/I Channel Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
Monitor Channel Access Directions . . . . . . . . . . . . . . . . . . . . . . . . . . .102
Monitor Channel Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
Channels of Access to U-Interface (Transmitter) . . . . . . . . . . . . . . . . .106
Channels of Access to U-Interface (Receiver) . . . . . . . . . . . . . . . . . . .107
Access to Data Transmission on U . . . . . . . . . . . . . . . . . . . . . . . . . . .108
Access to Data Received from U . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Access to EOC Transmission on U . . . . . . . . . . . . . . . . . . . . . . . . . . .111
Access to EOC Received from U . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
EOC-Procedure in Auto and Transparent Mode . . . . . . . . . . . . . . . . .114
Access to Single Bits Transmission on U . . . . . . . . . . . . . . . . . . . . . .115
Access to Single Bits Received from U . . . . . . . . . . . . . . . . . . . . . . . .120
Complete Activation Initiated by LT . . . . . . . . . . . . . . . . . . . . . . . . . . .126
Activation with ACT-Bit Status Ignored by the Exchange . . . . . . . . . .127
Complete Activation Initiated by TE . . . . . . . . . . . . . . . . . . . . . . . . . . .128
Complete Deactivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129
U Only Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130
LT Initiated Activation with U-Interface Active . . . . . . . . . . . . . . . . . . .131
TE Activation with U Active and Exchange Control (case 1) . . . . . . . .132
TE Activation with U Active and no Exchange Control (case 2) . . . . .133
Deactivation of S/T Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134
Activation with Repeater Initiated by LT. . . . . . . . . . . . . . . . . . . . . . . .135
Activation with Repeater Initiated by TE . . . . . . . . . . . . . . . . . . . . . . .136
Loss of Synchronization at Repeater (LT Side) . . . . . . . . . . . . . . . . . .137
Loss of Signal at Repeater (LT Side) . . . . . . . . . . . . . . . . . . . . . . . . . .138
Loss of Synchronization at Repeater (NT side) . . . . . . . . . . . . . . . . . .139
Loss of Signal at Repeater (NT side) . . . . . . . . . . . . . . . . . . . . . . . . . .140
Deactivation with Repeater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
DIN Control via CIWU:SPU in NT µP Mode. . . . . . . . . . . . . . . . . . . . .142
Wake Up Indication in Repeater Power Down . . . . . . . . . . . . . . . . . . .143
State Diagram Notation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145
State Transition Diagram in LT Modes . . . . . . . . . . . . . . . . . . . . . . . .147
State Transition Diagram in NT, TE and NT-PBX Modes . . . . . . . . . .161
State Transition Diagram in NT-Auto Activation Mode . . . . . . . . . . . .162
State Transition Diagram LT-Repeater Mode . . . . . . . . . . . . . . . . . . .174
State Transition Diagram NT-Repeater Mode . . . . . . . . . . . . . . . . . . .175
Relationship between CRC and FEBE Bits and Superframe Number .177
Block Error Counter Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183
CRC Violation Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .184
Test Loop-Backs Supported by the IEC-Q. . . . . . . . . . . . . . . . . . . . . .187
Complete Loop-Back Options in NT modes. . . . . . . . . . . . . . . . . . . . .189
Closing Loop-Back #1A in a Multi-Repeater System . . . . . . . . . . . . . .191
11
Data Sheet 01.99
PEB 2091
PEF 2091
Page