Polycom DOC2558B - Manual (Page 19)

Polycom RMX 2000 Hardware Guide
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RTM ISDN
The RTM ISDN card connects directly to an MPM/MPM+/MPMx. The
RTM ISDN card routes data between the MPM/MPM+/MPMx cards and
components of the system, converts ISDN T1/E1 media to IP packets and
provides connectivity to external ISDN networks.
The RTM ISDN card is installed on the rear panel of the RMX interfaces
between the RMX unit and the ISDN/PSTN switch. Up to two RTM ISDN
cards can be installed in one RMX 2000.
An RTM ISDN card must connect directly to an MPM/MPM+/MPMx
card:
•
In an RMX with a single MPM/MPM+/MPMx card – the RTM ISDN
card must be installed in the rear panel slot on the same level as the
MPM/MPM+/MPMx card
In an RMX with two MPM/MPM+/MPMx cards – the RTM ISDN
card can be installed in either of the two rear panel card slots. Up to a
total of 14 E1 or 18 T1 PRI cables can be installed with two MPM/
MPM+/MPMx and RTM ISDN cards
Each RTM ISDN card includes the following connections:
•
7 E1 or 9 T1 PRI lines that can be plugged into any of the 12
connections as shown in Figure 1-3
• 1 LAN port
With the RMX 2000, you can either have a dedicated E1 or T1 Type Network
Service. It is not possible to have a mixed E1 and T1 ISDN Network Service.