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4-20 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring ATM Logical Ports on Frame-based Modules
Defining ATM UNI DCE/DTE Logical Ports
3. See Table 4-8 to continue this configuration.
When you finish configuring the attributes in Table 4-8, continue with the section,
“Completing the Logical Port Configuration” on page 4-52.
CDV (usec): (0-5000)
Enter a CDV value (in seconds) that will be added to the
Lucent default trunk CDV. The default values are:
• 684 for the
1-port ATM IWU OC-3c/STM-1
• 191 for the 1-port ATM CS DS3/E3
To change the default, you need to know the maximum
CDV for PVCs on the port, as well as the hardware
traffic requirements at the opposite end of the
connection. If you believe that the path through the
network providing the OPTimum trunk connectivity will
introduce additional CDV (above the value provided by
the Lucent default), enter the appropriate value in this
field.
CRC Checking (HSSI
modules only)
Set this value to match the number of error checking bits
used by the CPE connected to this port. Performs a
cyclic redundancy check (CRC) on incoming data. Data
is checked in either 4K (CRC 16) or 8K (CRC 32)
frames.
Table 4-8. Configuring UNI DCE/DTE Attributes
For 1-port ATM CS DS3/E3 or 1-port
ATM IWU OC-3c/STM-1 cards see...
For frame-based cards see...
“ATM Attributes” on page 4-21 “Congestion Control Attributes” on
page 4-28
“ILMI/OAM Attributes” on page 4-26 “Trap Control Attributes” on page 4-31
“Priority Frame Attributes” on page 4-34
Table 4-7. Add Logical Port: Administrative Tab Fields (Continued)
Field Action/Description
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