Ricoh A250 Service Manual page 27

1. INSTALLATION........................................................................... 1-1
1.1 INSTALLATION PROCEDURE................................................................. 1-1
1.2 USER LEVEL PROGRAMMING ............................................................... 1-3
1.3 SERVICE LEVEL PROGRAMMING ......................................................... 1-4
2. SERVICE TABLES AND PROCEDURES ................................... 2-1
2.1 SERVICE LEVEL FUNCTIONS ................................................................ 2-1
2.2 BIT SWITCHES ........................................................................................ 2-2
2.2.1 G4 INTERNAL SWITCHES.............................................................. 2-2
2.2.2 G4 PARAMETER SWITCHES ....................................................... 2-10
2.3 DEDICATED TRANSMISSION PARAMETERS ..................................... 2-15
3. TROUBLESHOOTING................................................................. 3-1
3.1 ERROR CODES ....................................................................................... 3-1
3.1.1 D-CHANNEL LAYER MANAGEMENT............................................. 3-2
3.1.2 D-CHANNEL, LAYER 1 ................................................................... 3-2
3.1.3 D-CHANNEL LINK LAYER .............................................................. 3-2
3.1.4 D-CHANNEL NETWORK LAYER .................................................... 3-3
3.1.5 B-CHANNEL LINK LAYER............................................................... 3-3
3.1.6 B-CHANNEL NETWORK LAYER .................................................... 3-4
3.1.7 TRANSPORT LAYER ...................................................................... 3-4
3.1.8 SESSION LAYER ............................................................................ 3-5
3.1.9 DOCUMENT LAYER........................................................................ 3-6
3.1.10 PRESENTATION LAYER .............................................................. 3-6
3.2 G4CCU STATUS CODES ........................................................................ 3-7
3.2.1 LAYER 1 (PHYSICAL LAYER) ........................................................ 3-7
3.2.2 LAYER 2 (LINK LAYER) .................................................................. 3-7
3.2.3 NETWORK LAYER (LAYER 3)........................................................ 3-8
3.2.4 TRANSPORT LAYER (LAYER 4) .................................................... 3-8
3.2.5 SESSION LAYER, SESSION CONTROL LAYER
(LAYER 5)........................................................................................ 3-8
3.2.6 SESSION LAYER, DOCUMENT CONTROL LAYER
(LAYER 5)........................................................................................ 3-8
3.3 LEDS ........................................................................................................ 3-9
3.4 BACK-TO-BACK TEST........................................................................... 3-10
SM
ISDN UNIT A890
TABLE OF CONTENTS
i A250