psf2115 ETC-unknow, psf2115 Datasheet - Page 122

• Manufacturer Part Number: psf2115
• Description: Isdn Adapter Circuit Ipac
• Manufacturer: ETC-unknow

Non-Terminal Mode / LT-S Mode
Similar as in LT-T mode, both DU and DD are inactive outside the selected 4-byte
subscriber channel.
Also the reset value for the active channel can be selected by pin strapping (in LT-S and
LT-T modes by CH0-2), however after reset the host can reconfigure the active IOM-2
channel for layer 2 in ADF1:CSEL0-2. This reconfiguration is not valid for layer 1 and B-
channel HDLC.
Inside the programmed 4-byte subscriber channel (see figure 58):
– DU carries the 2B+D channels coming from S/T interface, and the MONITOR and
– DD carries the 2B+D channels towards the S/T interface, and the MONITOR and
By configuration of bit SDL (Switch Data Line, SPCR register) the data lines of the layer
2 controller of the IPAC can be switched. If SDL is set to ’0’, the layer 2 controller sends
the MONITOR, D and C/I-channels on DU, normally carried by DD, i.e. normally destined
to layer 1 S/T interface. This feature can be used for test purposes, e.g. to send the D-
channel towards the system instead of the subscriber (see figure 59).
Semiconductor Group
C/I channels from the layer-1
C/I channels to the layer-1.
122
Functional Description
PSB 2115
PSF 2115
11.97