Preliminary Information
MT9075B
Transmit National Bit Buffer (Page 0DH)
Page 0DH, addresses 10H to 14H contain the five bytes of the transmit national bit buffer (TNBB0 - TNBB4
respectively). This feature is functional only when control bit NBTB (page 01H, address 10H) is one.
Bit
Name
Functional Description
7 - 0
TNBBn.F1
-
Transmit S
Bits Frames 1 to 15. This byte contains the bits transmitted in bit
an+4
position n+4 of channel zero of frames 1, 3, 5, 7, 9, 11, 13 and 15 when CRC-4
multiframe alignment is used, or of consecutive odd frames when CRC-4
multiframe alignment is not used. n = 0 to 4 inclusive and corresponds to a byte of
the receive national bit buffer.
TNBBn.F15
Table 99 - Transmit National Bit Buffer Bytes Zero to Four (Page 0DH)
Receive National Bit Buffer (Page 0EH)
Page 0EH, addresses 10H to 14H contain the five bytes of the receive national bit buffer (RNBB0 - RNBB4
respectively).
Bit
Name
Functional Description
7 - 0
RNBBn.F1
-
Receive S
Bits Frames 1 to 15. This byte contains the bits received in bit
an+4
position n+4 of channel zero of frames 1, 3, 5, 7, 9, 11, 13 and 15 when CRC-4
multiframe alignment is used, or of consecutive odd frames when CRC-4
multiframe alignment is not used. n = 0 to 4 inclusive and corresponds to a byte of
the receive national bit buffer.
RNBBn.F15
Table 100 - Receive National Bit Buffer Bytes Zero to Four (Page 0EH)
Transmit Message Mode Buffer Zero and One (Pages 0FH and 10H)
Pages 0FH and 10H together contain 32 byte storage locations for data that may be transmit onto the equivalent
PCM 30 transmit timeslot. Transmission of these bytes is enabled by setting the TXMSG bits (bit 7) in the
equivalent Per Time Slot Control Register (page 07H and 08H). Table 97 shows the mapping between the Tx
Message Buffer addresses and the equivalent PCM 30 Channels.
Page 0FH (Tx Message
Buffer 0) Address:
0
0
0
1
1
1
2
2
2
3
3
3
4
4
4
5
5
5
6
6
6
7
7
7
8
8
8
9
9
9
10 11 12 13 14 15
10 11 12 13 14 15
10 11 12 13 14 15
Equivalent PCM 30
Timeslots
Page 10H (Tx Message
Buffer 1) Address:
Equivalent PCM 30 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Timeslots
Table 101 - Pages 0FH & 10H Address Mapping to CEPT Channels
65
MITEL [ MITEL NETWORKS CORPORATION ]
