User Manual

RPC Installation RPC/RP Manual
WLL-RPC/RP-IN/UM-1.0 19June2000
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Rec.726 compliant, from the RP. It supports 32 kbps channel signaling for
encoded voice and voice band data calls.
In addition, the E1IF communicates internally with the Radio Port Interface
(RPIF) module for interfacing RPs through the backplane busses and the switch in
the ECNT module.
The E1IF module is an E1 module (E1M) that provides 4 E1 connections to the
E1 network. The E1 module has the following functions:
• Originates/terminates 4 G.703/G.704 2.048 Mbps E1 interface
• Provides 75 ohm unbalanced interface
• Provides LEDs for module and port status and alarms
• Performs CRC-4 on the E1 line according to G.706
• Monitors performance of each E1 line
• Detects errors and alarms on the E1 lines.
Figure 2-5 depicts the processing of the E1IF module
Highway
Exchanger
ADPCM
CODEC
Loudness
Controller
ADPCM
Highway
E1 IF
LSI
LIF
A-law PCM Highway
A-law PCM
Highway
E1 to
COT
Bus
Controller
DPRAM
CPU
(16 bit)
DTMF
Sender
Reference
Clock
+5 V
Internal
Bus
RAM ROM
Address Bus
Data Bus
Figure 2-5: E1 Interface (E1IF) Module Block Diagram
Figure 2-6 shows the module’s physical configuration and describes the function
of the LEDs and the reset switch.