MC145572 Datasheet, PDF (142/264 Pages) Freescale Semiconductor, Inc – ISDN U-INTERFACE TRANSCEIVER

Freescale Semiconductor, Inc.
S/T
ÎÎ _{INFO 4}
AI
ÎÎÎÎ _{INFO 3}
AI
ÎÎÎÎÎÎÎÎÎÎ _{INFO 2}
ÎÎ _{INFO 1}
ÎÎÎÎÎÎÎÎ _{INFO 3}
ÎÎÎÎÎÎÎÎÎÎÎÎ _{INFO 4}
AR(1)
AR
ARL
AI
AIL
NT
ÎÎÎÎÎÎ _{linkup, SFS, aip_tp,}
ÎÎÎÎÎÎ _{act, dea, uoa}
ÎÎÎÎÎÎ _{act, sai}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Xact, dea, uoa}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Xact, sai}
ÎÎÎÎÎÎ _{Xact, dea, uoa,}
ÎÎÎÎÎÎ _{eoc = loopback}
ÎÎÎÎÎÎÎÎÎÎÎÎ _act
ÎÎÎÎÎÎÎÎÎÎÎÎ _act,
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{eoc = loopback (3)}
SL3T
SN3T
SL3T
SN3T
SL3T
SN3T
SL3T
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ_aXcelitXÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ_{oanaXcaikcpcaut=a_,tcp,ctsltp,}ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ^{Lotd,a,,SToedisaFpa=eacbS,aitxau}ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ_,,coukaoa(2,ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ₎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
AI
AR(1)
AR
ARL2
AI
AR(4)
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ^SWIÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ^TCH
NOTES:
1. According to recommendation T1E1.4/92–194, LT initiates request by lowering act bit.
2. LT requests loopback by means of eoc message.
3. Part will issue an AIL indication for as long as loopback is active.
4. LT will hold sending the downstream act bit until the eoc loopback message is acknowledged.
Figure 8–17. Time Diagram for Execution of Loopback 2 Once Link is Active
(Always Initiated by the Network)
8–18
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