Lucent Technologies MERLIN LEGEND Release 7.0 System Planning Manual page 171

MERLIN LEGEND Communications System Release 7.0
System Planning 555-670-112
3 Lines/Trunks
Selecting Line/Trunk Options
5. If configured with MLH (using either the MLHG or Series Completion
feature), indicate whether the hunt pattern is linear or circular by placing a
check in the appropriate column under the Hunt Pattern heading.
6. Indicate the features available on each BRI line:
Clock Synchronization
NOTE:
The following information is for planning clock synchronization in systems
that are not part of a private network. For planning clock synchronization in
a private network configuration, see the Network Reference .
If the system includes both 800 NI-BRI and 100D modules, clock synchronization
planning should be completed at the same time. There is only one primary/
secondary/tertiary clock for both 800 NI-BRI modules and 100D modules, with the
same system programming screens used for both types.
Plan your clock source administration to minimize the need for clock switching,
which is known to cause noise on active calls.
The primary, secondary, and tertiary clock sources, all three of which should be
programmed if possible, should be set in the following order:
1. The loop clock sources on BRI ports with DSLs in service. If at all possible,
all three clock sources should be on the same 800 NI-BRI module.
2. The loop clock source on any 100D module connected to the central office
and in service.
3. The loop clock source on any 100D module in T1 mode operating in a
tie-trunk configuration.
4. The local clock source on any 100D module.
NOTES:
IOC package "S" is available on the Lucent Technologies 5ESS,
Northern Telecom DMS-100, and Siemens SSC EWSD switches.
If configured with MLH service, the MLHG feature must be used if
the central office is a Northern Telecom DMS-100 switch. The
Series Completion feature must be used if the central office is a
Lucent Technologies 5ESS or Siemens SSC EWSD switch.
The MERLIN LEGEND System does not support Voice/Data hunt
groups with the Siemens SSC EWSD central office switch.
If CPN/BN is available, place a check in the CPN/BN column, as
appropriate.
3
Issue 1
April 1999
3-49