Network Access Services

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Network Access Services
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Essential Elements in Creating a Remote IP
Connection

• Modem
• Protocol to send packets across serial line (PPP,
  SLIP)
• Hardware to frame IP packets and place on IP
  network

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Terminal Server Modem
Router
Terminal Server
Modem
Modem
Modem
Modem
Modem
Modem
Modem
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Limitations

• Modems difficult to manage
• Separate Rack is expensive and takes space
• Individual modems have no central control and are
  of lower quality
• Complex configuration
• Terminal server may not support newer network
  features

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NAS
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NAS Advantages

• All in one box
• Integrated support for ISDN
• Supports PRI Lines
• Bond multiple channels into one
  session(Increased Bandwidth)
• Very high density packaging
• New NASs integrate well with Telephone network