psf21911 ETC-unknow, psf21911 Datasheet - Page 100

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

3.3
Table 22
Notes:
Semiconductor Group
Table 22 shows all U-interface signals as defined by ANSI.
Signal
SL3
SN3T
SL3T
TN
SP
TL
1)
2)
3)
SN0
SN1
SN2
SN3
SL0
SL1
SL2
Alternating
Must be generated by the exchange
Alternating
1)
1)
3)
2)
Layer 1 Activation/Deactivation
U-Interface Signals
Synch. Word
3 symbols at 10 kHz
3 single pulses of 12.5 s duration spaced by 1.5 ms
no signal
no signal
no signal
present
present
present
present
present
present
present
present
(SW)
3
3
Superframe
Test Mode
NT –> LT
LT –> NT
no signal
no signal
no signal
present
present
present
present
present
absent
absent
absent
(ISW)
100
3
3
Layer 1 Activation/Deactivation
no signal
no signal
2B + D
normal
normal
1
1
1
1
0
0
3
3
3
no signal
no signal
no signal
PSB 21911
PSF 21911
M-Bits
normal
normal
normal
normal
normal
1
1
1
3
3
11.97