Datasheet

Cisco Systems, Inc.
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Four- and Eight-Port Asynchronous/Synchronous Serial Network Modules (NM-4A/S,
NM-8A/S)
Figure 4
Eight Port Asynchronous/Synchronous Network Module NM-8A/S
The asynchronous/synchronous serial network modules provide flexible multi-protocol support, with each port
individually configurable in synchronous or asynchronous mode, offering mixed-media dial support in a single
chassis. Applications for Asynchronous/Synchronous support include:
• Low speed WAN aggregation (up to 128 Kbps)
• Dial-up modem support
• Async or Sync connections to management ports of other equipment
• Transport of legacy protocols such as Bi-sync and SDLC
LEDs
Network Module status indicator, five status LEDs for each serial port, including data send/receive indication.
Network Interfaces
Each Network Module has four or eight low-speed serial interfaces using DB-60 connectors. See Table 2 for the
available cables.