G4Ccu Status Codes; Layer 1 (Physical Layer); Layer 2 (Link Layer) - Gestetner A193 Service Manual

2. G4CCU STATUS CODES

The display of G4CCU status codes is affected by the Real Time Display
On/off setting (G4 Parameter Switch E, bit 0).
•
If Real Time Display is off (the bit is 0; this is the default setting), there is
no indication on the operation panel.
•
If Real Time Display is on (the bit is 1), the codes are fully displayed on
the operation panel.
The codes are defined in the following pages.

2.1. LAYER 1 (PHYSICAL LAYER)

Code (H)
10 Ready
01 S: [SETUP]
02 R: [CALL_PROC]
03 R: [CONN]
04 S: [CONN_ACK]
05 R: [SETUP ACK]
06 R: [ALERT]
11 R: [SETUP]
12 S: [CALL_PROC]
13 S: [CONN]
14 R: [CONN_ACK]

2.2. LAYER 2 (LINK LAYER)

Code (H)
20 S: SABM, or R: SABM
21 S: UA, or R: UA
22 S: FRMR, or R: FRMR
28 S: SABME, or R: SABME
(A644) ISDN
Status Code (H)
Status Code (H)
3-7
G4CCU STATUS CODES
Status
E0 R: [DISC]
E1 S: [REL]
E3 R: [REL_COMP]
E4 R: [STAT]
E5 R: [STAT_ENQ]
F0 S: [DISC]
F1 R: [REL]
F2 S: [REL_COMP]
F3 S: [STAT]
Status
D0 S: DISC, or R: DISC
D1 S: DM, or R: DM
SM