Ericsson HL950 Administrator's Manual page 47

4.2.7.3 E1 Unstructured CES with Adaptive Clocking and RAD Mode
The following explains how to set up E1 Unstructured CES RAD mode using adaptive clocking with
10ms Jitter buffer.
E1 Unstructured CES with Adaptive Clocking and RAD Mode
When reading the example scenario, consider the following points:
You may choose to configure the buffer length to prevent buffer overflow and underrun and,
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at the same time, control delay (greater buffer size means greater delay). The buffer length is
proportional to the maximum packet delay variation (PDV), which you can configure with the
set ces ip name=abcd, jb command. The default value is 10 milliseconds. The
measured value is displayed in the output of the show ces ip name=abcd, jb
command.
In the picture above, PABX1 provides the clock source to the IP network.
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PABX2 is clocked from the Branch Office HL950 extracted adaptive clock.
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NOTE!
In this mode the regenerated clock is subject to network Packet Delay Variation and may not
comply with jitter and wander specifications.
The HL950 Headquarters configuration (refer to Figure 19):
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Ethernet Configuration:
HL950> set interface data Ethernet:if=eth0, ip=10.1.10.1,
mask=255.255.255.252, gw=10.1.10.2;
HL950> start interface data Ethernet:if=eth0;
LIF E1 Module Configuration:
HL950> set interface line x1:tmode=unframed, cmode=slave;
HL950> start interface line x1
CES Application Configuration:
HL950> add ces ip:name=hl950_1, ip=10.2.20.1, port=1, payload=192,
cesoip=rad, clock=external, jb=10;
Page 47 (159)
Figure 19
Multi Service Edge Device HL950
Administrator's Guide
EN/LZT 108 5995 R3
June 2003