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Polycom RMX 4000 Hardware Guide
1-27
RTM ISDN
The RTM ISDN card connects directly to an MPM+. The RTM ISDN card
routes data between the 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 4000
An RTM ISDN card must connect directly to an MPM+ card:
• In an RMX with a single MPM+ card – the RTM ISDN card must be
installed in a rear panel slot at the
same level as the
MPM+
card
• In an RMX with two MPM+ cards – the RTM ISDN card can be
installed in any of the rear panel card slots. Up to a total of 14 E1 or 18
T1 PRI cables can be installed with two MPM+ and RTM ISDN cards
Each RTM ISDN card includes the following connections:
•1 LAN port
• 7 E1 or 9 T1 PRI lines that can be plugged into any of the 12
connections as shown in
Figure 1-12
Figure 1-12 RMX 4000 RTM ISDN Rear Panel Layout
.
Standby button Toggle between CPU activation and standby.
Table 1-8 RMX 4000 Rear Panel - RTM-IP 4000 Component Description
Item Description
LAN & LEDs
E1/T1 connections
H/S (Hot-swap) LED
With the RMX 4000, 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.