162
C
HAPTER
5: C
ONFIGURING
P
ATH
B
UILDER
S600 M
ODULES
, P
ORTS
,
AND
A
PPLICATIONS
Adaptive (Unstructured mode only)
—A non-required network-wide
synchronization technique used to regenerate the input service clock.
Adaptive timing uses a buffer depth indicator at the receiver to adjust the
line rate: the fuller the buffer, the faster the line rate; the emptier the buffer,
the slower the line rate.
Figure 125 illustrates the SRTS and Adaptive timing options.
Figure 125
CBR DSX Timing Options
Idle Timer
—The period of time the system monitors traffic activity to activate
the trunk conditioning:
5
,
15
,
30
,
45
, or
60
seconds. If there is no traffic
activity for the specified period of time, the system sends out the Trunk
Conditioning (per VC) alarm.
CRC-4
(CBR E1 only)—Enables or disables Cyclic Redundancy Check 4 (CRC-4)
information. CRC-4 is a framing option that checks for errors in data. It is a
communication check for parity/framing and is used for performance
monitoring in E1 networks. CRC4 can be enabled only in structured and
multi-frame mode.
Admin Status
—Administrative status:
Out of Service
or
In Service
.
c
Return to the CBR Configuration menu.
d
Repeat steps a and b for the other CBR DSX or CBR E1 ports you want to
configure.
e
Return to the CBR Configuration menu.
4
Configure virtual interfaces for the CBR card.
a
From the CBR DSX or CBR E1 Configuration menu, select
[6] Virtual Interfaces
to open the Virtual Interfaces Configuration menu. This menu is the same as
the MCPU Virtual Interfaces Configuration menu, shown earlier in this chapter,
in Figure 83.
DS1
DS1
AAL 1
-5 Hz
Reference Check
Send Difference (-5 Hz)
Reference - 5 Hz
AAL Header
Buffer
Clock
> <
Depends
on Buffer
Adaptive
Synchronous Residual Time Stamp (SRTS)
Summary of Contents for 3C63100-AC-C - PathBuilder S600...
Page 8: ...INDEX 3COM CORPORATION LIMITED WARRANTY ...
Page 14: ...xiv CHAPTER SUPPLEMENTARY REGULATORY INFORMATION ...
Page 18: ...18 ABOUT THIS GUIDE ...
Page 28: ...28 CHAPTER 1 SYSTEM DESCRIPTION ...
Page 74: ...74 CHAPTER 3 GETTING STARTED ...
Page 230: ...230 INDEX ...