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Chapter 1- Hardware Description
1-12
RTM ISDN
The RTM ISDN card connects directly to an MPM/MPM+. The RTM
ISDN card routes data between the MPM/MPM+ 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+ card:
• In an RMX with a single MPM/MPM+ card – the RTM ISDN card
must be installed in the rear panel slot on the
same level as the MPM
/
MPM+
card
In an RMX with two MPM/MPM+ 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+ 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
Figure 1-3 RMX 2000 RTM ISDN Rear Panel Layout
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.
LAN & LEDs
E1/T1 connections
H/S LED
The RTM ISDN card supports 200 audio participants, regardless of whether the
spans are E1 or T1.