System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Clock configuration in the XMP1 network
Aastra Proprietary Information Page 2-19
2.3.6 Clock configuration in the XMP1 network
Settings regarding the configuration of clock control in the XMP1 network
are performed via the clock priority list and central or decentral card slot
data of the modules.
Clock control settings via the central or decentral card slot data are
executed for the Central Units and port modules.
2.3.6.1 Central Units
Central card slot data
The following table gives an overview of the info nos. of the central card slot
data that can be used for clock control.
2.3.6.2 Port modules
Decentral card slot data
With port modules, the settings for clock control are performed using the
info nos. of the decentral card slot data.
These info nos. are listed in the following table.
2.3.6.3 Preferring local clock sources
A network node can have clock sources distinguishing themselves by their
high precision and reliability. However, it is possible that these clock sources
are nevertheless not used for clock recovery in the network, because they
have been assigned such a low priority that they are never used for clock
recovery.
Tab. 2.G: Central card slot information - Central units
Info no. Description Default value
2 Prefer local clock sources yes = 1 0
3 Reserve priority 2 for preferred clock tree yes = 1 0
4 Node phase-rigid w/o co-ch. radio port yes = 1 0
5 Switch off T3out when port is faulty yes = 1 0
6 Recover T3out from Rx clock yes = 1 0
9 Operation with preferred clock priorities yes = 1 0
10 Wander filter yes = 1 0
Tab. 2.H: Decentral card slot data - Port modules
Info no. Description Default value
10 Suppress clock priority (F1in) yes = 1 0
12 Preferred port for priority 1 yes = 1 0
14 Short delay time in linear networks yes = 1 0