
Configuring Line Services
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If you have configured both synchronous ports, disable this parameter first on the
synchronous interface that is either running at a lower clock speed or carries
lower-priority traffic. You should disable this parameter on both synchronous
interfaces only if those interfaces are DSDE configurations and you configured
both Ethernet interfaces. In these configurations, disable this parameter on both
synchronous interfaces if disabling it on only one interface does not eliminate the
excessive TxUflo or RxOflo errors on the two Ethernet interfaces.
You can enable or disable DMA Burst cycles for the interface.
Specifying the Link Level Protocol
The Service parameter specifies the link-level protocol for this interface. You can
set the link-level protocol to
• Transparent
• LLC1
• LAPB
The synchronous interface is configured for LLC1 by default.
If you set this parameter to Transparent, then raw HDLC mode is in effect. LLC1
specifies connectionless datagram service; it prefixes the HDLC address and
control fields to the frame.
If X.25 is enabled on this line, this parameter must be set to LAPB.
You can set the link-level protocol for the interface.
Setting the Transmit Window Size
The Transmit Window Size parameter controls the number of I-frames that can be
transmitted without acknowledgment.
Site Manager: Burst Count parameter: page A-59
Site Manager: Service parameter: page A-60
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