Ericsson HL950 Administrator's Manual page 35

4.2.3.5 E1 Structured CES with Synchronous Clocking
The following explains how to set up E1 Structured CES using synchronous clocking with 10ms Jitter
buffer.
NOTE!
Synchronous clocking must be used for structured CES.
When reading the example scenario, consider the following points:
In the figure above, PABX1 and PABX2 are clocked from the same clock source, PRS (from
!
service provider). We will use the following command to implement this network topology:
The HL950s derives a network clock source from DSLAM, which is directly connected with
the set interface wan shdsl ntrmode=ref8k command.
The line code on both PABXs is High Density Binary 3, HDB3. This is default on the HL950
!
so it does not need to be explicitly configured.
PVC 0/40 is used between HL950 and DSLAM.
!
No partial fill bytes.
!
The idle code on both PABXs is 0x7f. This is default on the HL950 so it does not need to be
!
explicitly configured.
There is a 16 x 64k circuits in this example.
!
mask is a SDT and CAS channel bitmask of which channels with the bit of the far right is the
!
first Time Slot (TS0).
Page 35 (159)
Figure 13
E1 Structured CES with Synchronous Clocking
Multi Service Edge Device HL950
Administrator's Guide
EN/LZT 108 5995 R3
June 2003