CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 63)

Chapter 4 Data Interfaces
T1/E1 Interfaces
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connection. These signal channels operate independently from the main data channel of the V.35
interface. A worst case sampling jitter of 21 microseconds will be experienced on these channels.
There are six end-to-end control lead pairs. They are listed below with the input signal listed first:
• TD to RD
• STD to SzRD
• DTR to RI
• SRTS to SDCD
• DSRS to SCTS
• RTS to DCD
4.7 T1/E1 Interfaces
4.7.1 Transparent Bipolar - Models 4BX
NOTE: This interface replaces the 4T (1-3) and 4E (1-3) models. It is completely
compatible with these previous interface models.
The 4Bx interfaces are compatible with any bipolar, line-coded T1 or E1 data (1.544 or 2.048
Mbps). All types of codes, including AMI, B8ZS, B7S or HDB3, will be accurately transmitted/
received. Five DIP switches are used in configuring particular applications (refer to Table 4-14).
Switch positions 1 and 2 select T1 or E1. Positions 3 through 5 select line build out values for T1
usage.
There are three different types of interface connectors, and each is identified by the number at
the end of the interface code of the order number (refer to Table 4-15). The connectors are
female DA-15 (4B1); four-position terminal block (4B2); or two female BNCs (4B3). Figure 4-2
shows how the input and output pairs are wired to these connectors.