System information

FCD 901 48

Issue R2A, 07.2009

XMP1 Release 5.5 System Description

Regionalization of clock synchronization

Aastra Proprietary Information Page 2-27

List 1 specifies that clock priorities 10 and 5 are to be preferred as local

clock priorities by nodes 1 to 10 (sub-network 1).

Figure 2.11: Example

List 1 containing the clock priorities 10 and 5 is sent to nodes 1 to 10 by

means of the debugging command (set_vz_tp 1, 10, 5).

For nodes 1 to 10, the central card slot information no. 9 of the Central Units

must be additionally set to "Operation with preferred clock priorities".

These settings ensure that nodes 1 to 10 use the local clock priorities

defined in list 1 for clock control.

In this way, the entire network is divided up into sub-networks by defining

stage-1 lists (list 1) regarding clock priority control.

The 2nd stage (list 2) for nodes 1 to 10 includes the clock priorities (4, 12,

11 and 8) of list 1 of the neighbouring sub-networks 2 and 4.

This list 2 is also sent to nodes 1 to 10 by means of debugging command

(set_vz_tp 2, 4, 12, 11, 8).

For sub-networks 2 to 6, the lists are defined accordingly and sent to the

nodes.

Prio 10

T3in

Prio 5

T3in

Node 1

Node 5

List 2, 4, 12, 11, 8

List 1, 10, 5

Node 2

Node 3

Node.4

Node 6

Node 7

Node 8

Node 9

Node.10

"Sub-network 1"