Polycom DOC2559C - Manual (Page 35)

Polycom RMX 4000 Hardware Guide
1-29
RTM ISDN
The RTM ISDN card connects directly to anMPM+/MPMx. The
RTM ISDN card routes data between the 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. In an RMX with a
single MPM+/MPMx card – the RTM ISDN card must be installed in the
rear panel slot on the same level as the MPM+/MPMx card. In an RMX
with at least two MPM+/MPMx cards – the RTM ISDN card can be
installed in any two rear panel card slots.
Up to two RTM ISDN cards can be installed in one RMX 4000. Up to a
total of 14 E1 or 18 T1 PRI cables can be installed with two 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.
E1 and T1 spans cannot nbe connected simultanously to the same card,
therefore, it is not possible to have a mixed E1 and T1 ISDN Network Service.
Figure 1-12 RMX 4000 RTM ISDN Rear Panel Layout
Standby button Toggle between CPU activation and standby.
Table 1-10 RMX 4000 Rear Panel - RTM-IP 4000 Component Description
Item Description
LAN & LEDs
E1/T1 connections & LEDs
H/S (Hot-swap) LED