STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
PROPRIETARY AND CONFIDENTIAL
229
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
1
1
1
1
0
0
0
0
1
1
1
1
1
0
0
1
0
0
0
0
1
0
0
1
0
0
0
0
0
1
1
0
*Note: The μ-Law digital milliwatt pattern used is that defined in
Recommendation G.711 for μ-law:
Table 52
- μ-Law Digital Milliwatt Pattern
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
1
0
0
1
1
1
1
1
1
1
1
1
1
0
0
1
1
0
0
1
1
1
1
1
1
1
1
1
0
1
1
0
0
1
1
0
SIGSRC:
The SIGSRC bit is valid only if Channel Associated Signaling (CAS) is
selected in the E1-TRAN Configuration Register; otherwise, it is ignored.
When valid, the SIGSRC bit selects the source of the timeslot signaling bits: if
SIGSRC is a logic 0, the signaling bits are taken from the incoming BTSIG
stream in the format specified by the SIGEN and DLEN bits in the E1-TRAN
Configuration Register; if SIGSRC is a logic 1, the signaling bits are taken
from the A',B',C', and D' bit .
T1 Mode
Signaling insertion is controlled by the SIGC[1:0] bits. The source of the
signaling bits is determined by SIGC0: when SIGC0 is set to a logic 1, signaling
data is taken from the A', B', C', and D' bits; when SIGC0 is set to logic 0,
signaling data is taken from the A,B,C, and D bit locations on the BTSIG input.
Signaling insertion is controlled by SIGC1: when SIGC1 is set to a logic 1 and