Fore Systems forerunner series, Configuration Manual

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ForeRunner ATM Switch Network Configuration Manual
B - 3
Configuring Circuit Emulation Services
C
o
nfigu
ri
ng Cir
c
ui
t
Em
ul
ation
Ser
v
ice
s
NOTE
SRTS is only available on unstructured
connections, which are created by specifying
all
for the
<timeslots>
parameter.
The
-cas
and
-partialfill
options are not
applicable to unstructured mode.
Structured mode is selected by indicating the
exact timeslots to be used. For example, timeslots
1, 2, and 3 would be entered as 1-3, timeslots 2, 4,
and 6 would be entered as 2:4:6, and
combinations such as 1-4:9-11:12 are allowed.
The parameters for new are defined as follows:
Parameter Description
port The port on which the CES connection is to be created.
timeslots Indicates which timeslots (1-24 for DS1, 1-31 for E1) are being configured for a particular
PVC.
all
indicates unstructured service. The time slot assignments may be either contig-
uous or non-contiguous DS0s.
oport The output port of the CES connection, which can be a CES port or an ATM port.
ovpi The output Virtual Path Identifier (VPI) of the CES connection when the output port is not
a CES port.
ovci The output Virtual Channel Identifier (VCI) of the CES connection when the output port is
not a CES port.
ots The output timeslots of the CES connection when the output port is a CES port.
srts Indicates whether Synchronous Residual Time Stamp (SRTS) clock recovery is to be
enabled on this connection.
on
indicates that SRTS is enabled,
off
indicates that SRTS is
disabled. The default is
off
.
-fupc <index> The UPC contract type to be used in the ingress direction of the connection. (See Part 2 of
the AMI Configuration Commands Reference Manual for more information about UPC con-
tracts.)
-bupc <index> The UPC contract type to be used in the egress direction of the connection. (See Part 2 of
the AMI Configuration Commands Reference Manual for more information about UPC con-
tracts.)
cas Indicates whether Channel Associated Signalling (CAS) is to be used on the connection.
basic
indicates that CAS will not be used,
cas
indicates that CAS will be used. The
default is
basic
.
partialfill Indicates how many of the available 47 payload bytes in each cell are used before they are
deemed “full” and ready for transmission across the ATM network (i.e., how much of the
ATM cell contains data and how much is filler). The range for this parameter is 5 to 47. The
default value is
47
, for 47 bytes of data. partialfill is used to minimize network transmis-
sion latency and is useful especially with time-sensitive, robbed-bit signalling sources.