MT8910-1 Mitel Networks Corporation, MT8910-1 Datasheet - Page 8

• Manufacturer Part Number: MT8910-1
• Description: CMOS St-bus Family Digital Subscriber Line Interface Circuit
• Manufacturer: Mitel Networks Corporation

MT8910-1
•
•
•
9-10
T0 = 15 sec timer
T1 = 480 ms timer
T2 = 40 ms timer
T3 = 520 ms timer
Note
TL:
SL0:
SL1:
1
: Loss of received signal will
result in a loss of sync.
A 10 kHz activation tone sourced by the
LT which is generated by sending a
continuous pattern of four +3 symbols
followed by four -3 symbols.
SL0 is a no signal condition generated
from the LT.
An LT generated signal consisting of a
framed (but not superframed),
scrambled 2B1Q signal which carries all
1s in the B-, D- and M-channels. This
signal is used to train the LT’s echo
canceller.
Expiry of T1
Figure 6b - Activation/Deactivation State Diagram - NT Mode
(Power down
Tx-TN (9 ms)
DFE/Timing
EC Training
MRST Pin
Full Reset
Framing
Alerting
Tx-SN3
Tx-SNO
Tx-SN0
Tx-SN2
Active
Tx-SN1
Tx-SN0
Quiet
Train
EC
Converged
ST.T1
SFS
Signal
Detected
STP.T1
RCV TL or
LAR
ST.T0
SL2
Detected
Expiry of T0
Expiry of T0
Expiry of T0
ST.T3
LDR
RCV TL
ST.T0
STP.T2
•
•
Loss of BFS > 480ms
Expiry of T2
RCV Reset
SL2:
SL3:
Pending Deact.
Tx-SN0
Tx-SN3
ST.T3
An LT generated signal consisting of a
fully framed and superframed
scrambled 2B1Q signal which carries all
0s in the B- and D-channels with
information in the M-channel. This
signal is used to train the NT’s DFE.
An LT generated signal consisting of a
fully framed and superframed scrambled
2B1Q signal which carries information in
all the B-, D- and M-channels.
ST.Tx = Start Timer x
STP.Tx = Stop Timer x
LAR = Local Activation Request
LDR = Local Deactivation Request
SFS = Superframe Synchronization Acquired
Loss of
far-end
signal
STP.T3
ST.T2
1
Preliminary Information
ST.T3
Loss of signal
STP.T3
ST.T2
ST.T3
Tear Down
Tx-SN0
Expiry
of T3