ADC FCS-717 4B, Technical Practice, Page: 14 / 40

Functional Description SCP-FCS717-042-03H
4 January 6, 2003 FCS-717 List 4B
Backplane Connections
Table 4 through Table 6 provides the connector pinouts located on the backplane for alarm or Pair Gain Test
Controller (PGTC) interface unit, line unit, and channel unit connectors.
Table 7 on page 8 provides connectors and termination points located on the backplane for:
• CO power (-48V_A, -48V_B) and CO return (RTN_A, RTN_B)
• frame ground
• Local Area Network (LAN)
• data
• HDSL, test, composite clock, auxiliary power pairs, and external Alarm Cutoff (ACO) switch
• alarm or PGTC test interface
• subscriber lines with Amphenol connectors (P1, P2, and P3)
Table 3 lists the FCS-717 List 4B connectors and where each is described in this practice (see Figure 2 on page 8
for connector locations).
Table 3. FCS-717 List 4B Card Connectors
Connector and Fuse Go to On
Alarm Unit or PGTC Interface Unit Table 4 page 5
Line Unit Connectors (Systems 1 thru 3) Table 5 page 6
Channel Unit Connectors (Systems 1 thru 3) Table 6 page 7
Use the Information in Table 4 through Table 6 for diagnostic and troubleshooting
procedures under the direction of an authorized ADC technical support
representative.