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Forum Gateway 560 Connection via PCM-V Connection
137
Notes
Please note the following pointers regarding interface cards and ports when
operating connected Forum Gateways 560:
●
All U
pn
, S
0
and a/b ports on interface cards of a PCM slave gateway can
be used with corresponding telephones. All features for system phones on
U
pn
ports can be used without restriction.
●
The S
0
ports of the slave system can also be used for trunk lines or for
PBX networking (see
●
The ISDN-L1 reference clock is always passed on from the PCM master
gateway to the PCM slave gateway. The reference clock thus has to be
supplied by an S
0
port – or preferably by an S
2M
port – on the PCM master
gateway. If the Forum 5004/5008/5012 communications system is to be
connected to the public TDM network via the connected
Forum Gateways 560, there has to be at least one ISDN trunk line
connected to the PCM master gateway. If no external trunk line is
connected, the master gateway generates the reference clock.
●
It is possible to operate an S
2M
interface card Forum 550 Card PRA in the
PCM slave gateway. Because the ISDN-L1 reference clock from an S
0
interface card is not precise enough, you require an S
2M
interface card in
the PCM master gateway as clock source.
Содержание Forum 500 Series
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