Siemens HiPath 3000 Series Service Documentation page 175

Nur für den internen Gebrauch
Table 3-19 Recommendations for CMA and CMS Utilization
Trunk Reference
connec- clock
tion
Networking via Ethernet/IP (10/100 BaseT) lines:
System 1
No trunk –
or analog
trunk
ISDN S Via ISDN
0
(not al- S trunk
0
ways ac- connection
tive) (if active)
ISDN S Via ISDN
0
(always S trunk
0
active) connection
ISDN Via ISDN
S S trunk
2M 2M
connection
1 CMS is not necessary if the reference clock supplied by the CO is always available via the networking lines (not a trans-
parent clock).
2 CMA is not necessary if ADPCM conversion is not needed for HiPath Cordless Office (see Table 11-1).
3 CMS is not necessary but is recommended for the following reasons: Although an Ethernet link is an asynchronous con-
nection, buffer overflow/underflow can cause transmission errors. To avoid this, the clock difference between the master
and the slave systems should be as small as possible so that the receive and send buffer can be read and addressed at
the same speed on both sides. The more accurate the clock source in the relevant systems, the fewer the faults.
A31003-H3590-S100-7-7620, 06/2012
HiPath 3000/5000 V9, Service documentation
HiPath Cordless
Office
no yes
3
CMS CMS or CMA
(see
Table 11-1)
3
CMS CMS or CMA
(see
Table 11-1)
2
– CMA
2
– CMA
Trunk Refer-
connec- ence
tion clock
System(s) n+1
No trunk –
or analog
trunk
ISDN S Via ISDN
0
(not al- S trunk
0
ways ac- connection
tive) (if active)
ISDN S Via ISDN
0
(always S trunk
0
active) connection
ISDN S Via ISDN
2M
S trunk
2M
connection
boards.fm
Boards for HiPath 3000
Central Board
HiPath Cordless
Office
no yes
3
CMS CMS or CMA
(see
Table 11-1)
3
CMS CMS or CMA
(see
Table 11-1)
2
– CMA
2
– CMA
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