psf21911 ETC-unknow, psf21911 Datasheet - Page 104

• Manufacturer Part Number: psf21911
• Description: Isdn Echocancellation Circuit Terminal Applications Iec-q
• Manufacturer: ETC-unknow

Partial Activation (U Only)
The IEC-Q TE is in the “Synchronized 1” state (see state machine) after a successful
partial activation. IOM-2-clocks DCL and FSC are issued. On DOUT the C/I-message
“DC” as well as the LT-user data is sent.
While the C/I-messages “DI” (1111
IEC-Q TE will transmit “SAI” = (0) upstream. Any other code results in “SAI” = (1) to be
sent. On the U-interface the signal SN3 (i.e. 2B + D = (1)) will be transmitted continuously
regardless of the data on DIN.
The LT will transmit all user data transparently downstream (signal SL3T). In case the
last C/I-command applied to DIN was “UAR”, the LT retains activation control when an
activation request comes from the terminal (confirmation with C/I = “AR” required, see
page 106 (case 1). With C/I “DC” applied on DIN, TE initiated activations will be
completed without the necessity of an exchange confirmation (page 107 (case 2)).
Figure 38 U Only Activation
Semiconductor Group
INFO
INFO
S/T
0
0
SBCX
IOM -2
NT
DC
DC
PU
DI
R
IEC-Q TE
SL3T
SL2
B
SN3
) or “TIM” (0000
U-Reference Point
act
act = 0 dea =1 uoa =1
0 =
act
104
SN0
SN0
SN2
SL0
SN1
SL1
TN
TL
0 =
dea
sai
1 =
=
uoa
0
0 =
Layer 1 Activation/Deactivation
B
) are received on DIN, the
IEC-Q
IOM -2
UAR
ARM
(DC)
UAI
DC
LT
AR
DI
R
EPIC
ITD10205
PSB 21911
PSF 21911
R
11.97