DS26502 Maxim Integrated Products, DS26502 Datasheet - Page 54

• Manufacturer Part Number: DS26502
• Description: T1/E1/J1/64KCC BITS Element
• Manufacturer: Maxim Integrated Products

11. T1 SYNCHRONIZATION STATUS MESSAGE
The DS26502 has a BOC controller to handle SSM services in T1 mode.
Table 11-1. T1 SSM Messages
11.1 T1 Bit-Oriented Code (BOC) Controller
The DS26502 contains a BOC generator on the transmit side and a BOC detector on the receive side. The
BOC function is available only in T1 mode. In typical BITS applications, the BOC controller would be
used to transmit and receive Synchronization Status Messages in T1 mode over the data link.
11.2 Transmit BOC
Bits 0 through 5 in the TFDL register contain the BOC or synchronization status message to be
transmitted. Setting BOCC.0 = 1 causes the transmit BOC controller to immediately begin inserting the
BOC sequence into the FDL bit position. The transmit BOC controller automatically provides the abort
sequence. BOC messages will be transmitted as long as BOCC.0 is set. TFSE (T1TCR2.6) must be set =
0 when using the transmit BOC function.
To transmit a BOC, use the following:
1) Write 6-bit code into the TFDL register.
2) Set SBOC bit in BOCC register = 1.
User Assignable
QUALITY
LEVEL
1
2
3
4
5
6
7
Stratum 1 Traceable
Synchronized Traceablity Unknown
Stratum 2 Traceable
Stratum 3 Traceable
SONET Minimum Clock Traceable
Stratum 4 Traceable
Do Not Use For Synchronization
Reserved For Network Synchronization Use
DESCRIPTION
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0000010011111111
0000110011111111
0001000011111111
0010100011111111
0000100011111111
0010001011111111
0011000011111111
0100000011111111
DS26502 T1/E1/J1/64KCC BITS Element
BOC CODE