12
Installation PTN-4-2/4WEM
Release 01 02/2018
Figure 7
Single Path Disabled
2.2.6
CES: Delay Comparison in CES Features
Table 6
Delay Comparison in CES (Features)
CES Hitless Switching Single Path Resulting Delay
X
---
---
lowest
X
X
---
medium
X
X
X
highest
X = enabled; --- = disabled
2.2.7
I/O with the Central Switching Module (=CSM)
The 4-2/4WEM module receives traffic via its front panel ports and converts this into
Ethernet traffic which is forwarded to the CSM via the backplane. The CSM does all the
processing on this data (synchronization, CRC checks, conversions, switching…). The CSM
converts this data into MPLS-TP packets and transmits it via a WAN port (on an IFM that
supports WAN) onto the WAN. On the destination side, the same processing occurs in
reverse order.
2.2.8
Synchronization / Clock Distribution / Network Timing
CAUTION: Make sure to configure/verify the clocking parameters below.
The Dragon PTN network provides a number of mechanisms to perform synchronization /
clock distribution / network timing per CES. The CSM synchronizes all the included IFMs in
the node.
The application endpoints in a 'Circuit Emulation: 2W4W Voice' service can communicate in
a synchronized way. Which method can be used depends on:
data
Voice data
data
Single Path
DISABLED:
BOTH links required
only with both links up
CES starts
no links up:
no CES
Voice data
MPLS-TP Dragon PTN
MPLS-TP Dragon PTN
