Chapter 2. Installation61200305L1-1 ATLAS 550 User Manual 2-7Table 2-5 shows the pinout for the External Alarm Relay connector.Network ConnectionThe ATLAS 550 provides two Network Interface Slots that allow differenttypes of interfaces to be used. Currently only a T1 Network Interface is avail-able. In the remainder of this manual, discussions about the Network Inter-face Module refer to the T1 Network Interface Module. The T1 NetworkInterface (NI) port complies with the applicable ANSI and AT&T® stan-dards. The T1 Network Interface Module provides the following functions:• AMI or B8ZS coding• Manual line build-out• D4 or ESF framing• Network performance monitoring and reporting• Test loopbacks with QRSS generation and checking• Extensive self-testingThe network connections follow, with the pinouts shown in Table 2-6 andTable 2-7 on page 2-8.Table 2-5. External Relay Monitor Connector PinoutPin Name Description1 Alarm Out Outputs EIA-232 level signal for connection to externalalarm contacts.2 Alarm In Monitors signal coming from external alarm contacts.Connector type (USOC) RJ-48CPart number AMP# 555164-2Table 2-6. Network RJ-48C PinoutPIN NAME DESCRIPTION1 R1 RXDATA-RING Receive data from the network2 T1 RXDATA-TIP Receive data from the network3 UNUSED —4 R TXDATA-RING Transmit data toward the network5 T TXDATA-TIP Transmit data toward the network6, 7, 8 UNUSED —
