ADTRAN 2 x E1 user manual Block diagram of the BBP is shown in Figure, VT100 RS-232 Interface

61280004L2-1C

Section 1 TRACER Description

A block diagram of the BBP is shown in Figure 1-5.

RS-232	UART	µC	Baseband Processor Board	DSP
E1 A	E1	Data	Viterbi	Spread
				Spectrum
		Multiplexer	Encoder/
				Data
			Decoder
E1 B	E1			Pump
		Fc = 140 MHz
IF	Filter		Σ
			90
		Fc = 70 MHz
			90
		IF Interface Board
21-56
VDC

Figure 1-5. BBP Block Diagram

VT100 RS-232 Interface

An RS-232 interface is provided via a 25-pin D connector for attaching a VT100 compatible terminal. The active signals used on this interface are listed below

Signal Name Pin Number		Source
Transmit Data	2	Terminal/Modem
Receive Data	3	TRACER
Request to Send	4	Terminal/Modem
Clear to Send	5	TRACER
Data Set Ready	6	TRACER
Signal Ground	7

The management system allows the E1 interfaces to be provisioned. The line code can be selected as AMI or HDB3. The signaling can be selected as channel associated signaling (CAS) or common channel signaling (CCS). Alarm conditions can also be monitored. The management system will report the following alarms on the E1 interfaces:

4 TRACER 2 x E1 User’s Manual