PEB22554 SIEMENS [Siemens Semiconductor Group], PEB22554 Datasheet - Page 64

• Manufacturer Part Number: PEB22554
• Description: ICs for Communications
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

3.7.1
The framing structure is defined by the contents of time-slot 0 (refer to table 6).
Table 6
Allocation of Bits 1 to 8 of Time-Slot 0
Alternate
Frames
Frame Containing the
Frame Alignment Signal
Frame not Containing
the Frame Alignment
Signal or
Service Word
Note:
1. S
2. Fixed to ‘1’. Used for synchronization.
3. Remote alarm indication: In undisturbed operation ‘0’; in alarm condition ‘1’.
4. S
Note: (*) As a special extension for double frame format, the S
Semiconductor Group
Access to received information via bits RSW.RSI and RSP.RSIF. Transmission is
enabled via bits XSW.XSIS and XSP.XSIF.
received information via bits RSW.RY0 … RY4. Transmission is enabled via bits
XSW.XY0 … XY4. HDLC-signaling in bits Sa4- Sa8 is selectable. (*)
i
a
bits: reserved for international use. If not used, these bits should be fixed to ‘1’.
XSA4-8 may be used optionally.
bits: Reserved for national use. If not used, they should be fixed at ‘1’. Access to
Doubleframe Format
Bit
Number
1
S
Note 1
S
Note 1 Note 2
i
i
2
0
Frame Alignment Signal
1
3
0
A
Note 3 Note 4
64
4
1
S
a4
5
1
S
Functional Description E1
a5
a
-bit registers RSA4-8 /
6
0
S
a6
7
1
S
PEB 22554
a7
8
1
S
09.98
a8