Beta Draft Confidential
Configuring ATM Traffic Descriptors
Control Channel Default TDs
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 1/19/0512-15
Table 12-7. Trunk Control Channel TD Defaults
DS1 E1 E3
(with
PLCP)
DS3
(with
PLCP)
DS3
(with HEC)
OC-3c/
STM1
a
OC-12c/
STM4
b
Type
NoClpNoScr
c
NoClpNoScr NoClpNoScr NoClpNoScr NoClpNoScr NoClpNoScr NoClpNoScr
Class
CBR CBR CBR CBR CBR CBR CBR
PCR
d, e
(CPS)
90 115 2000 2400 2600 CBX 6750
GX 9100
CBX 6750
GX 28000
a
For OC3/STM1 and OC12/STM4, the default values are associated with the maximum control channel transmission rate
the card type supports. For CBX IOMs, this is 13500 CPS; for GX BIOs this is 56000 CPS.
b
For OC-3c/STM1 and OC-12c/STM4, the default values are associated with the maximum control channel transmission
rate the card type supports. For CBX IOMs, this is 13500cps; for GX BIOs, this is 56000.
c
The default type, NoClpNoScr, represents the following: PCR CLP=0+1.
d
If the configured logical port bandwidth is less than the physical port bandwidth, then PCR is 2.5% of logical port
bandwidth.
e
Approximate equivalent bandwidth (EBW) values are not provided in this case for CBR circuits, EBW=PCR.
Note – Both a trunk signaling and a node-to-node management control channel are
used on a trunk. This means that when you examine the bandwidth reserved on a trunk
that uses these default values, the values that are reserved are equal to the values in
this table times two.
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