4. Configuration

Selecting the Link Layer Protocol

Two link layer protocols, Point-to-Point Protocol (PPP) and Serial Line Internet Protocol (SLIP), are supported for connection to an external SNMP manager, Telnet device, or network device (e.g., a router). PPP can be used for synchronous or asynchronous operation. SLIP can be used for asynchronous operation only.

NOTE:

The carrier-mounted DSU/CSU does not support synchronous operation on the COM port.

he standalone DSU/CSU implementation of PPP supports the following:

Full negotiation of PPP’s Link Control Protocol (LCP).

Active negotiation of LCP when the connection is established.

Maximum Request Unit (MRU) sizes up to 1500 bytes, but the DSU/CSU will attempt to negotiate down to 500 bytes.

The DSU/CSU provides a unique LCP magic number derived from the unit

Tserial number and the elapsed time. Full negotiation of escape characters.

The DSU/CSU implementation of PPP does not support Link Quality Reports (LQR), compression, encryption, Password Authentication Protocol (PAP) or Challenge Handshake Authentication Protocol (CHAP).

The DSU/CSU implementation of SLIP supports a fixed MRU size of 1006 bytes.

Before selecting the protocol, you must first select the port to be used as the communications link. Refer to Selecting the Port on page 4-14.This example assumes that the COM port is being used as the communications link.

3160-A2-GB24-10

March 2001

4-17

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Paradyne 3161, and 3165-A4, 3160-A4 manual Selecting the Link Layer Protocol
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3160-A4, 3161, and 3165-A4 specifications

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