The table, Trunk mbms – Nortel Networks BCM50 User Manual
Page 41
Chapter 2 Introducing the BCM50 hardware
41
Installation and Maintenance Guide
Trunk media bay modules
Trunk media bay modules connect telecommunications lines to the BCM50 2.0 system.
The table
on page 41 lists the types of trunk media bay modules that are available
for the BCM50 2.0 system.
Digital trunk media bay module
The digital trunk media bay module (DTM) connects to standard digital PSTN T1/fT1, E1/fE1, or
PRI ISDN line using either a digital or PRI line. The DTM also supports DASS2, DPN22, Q.SIG,
and MCDN over ISDN:
•
On North American BCM50 systems, the DTM connects a T1 or PRI circuit to the BCM50;
T1 circuits provide 24 digital channels to the PSTN and PRI circuits provide 23 digital
channels to the PSTN.
•
On International BCM50 systems, the DTM connects to a ETSI ISDN (E1) or PRI (EI) circuit
to a BCM50, providing a maximum of 30 digital channels to the PSTN.
The front bezel of the DTM has an RJ-48C connector that connects the DTM to the service
provider connection point. The faceplate also has a set of monitor jacks you can use to monitor the
span.
Six additional LEDs are on the front of the DTM. For information about these additional LEDs,
see
The figure
on page 42 shows the DTM module interfaces.
Table 3 Trunk MBMs
Module type
Function
Special notes
DTM
Connects digital public switched
telephone lines to the BCM50 2.0
system.
Can connect to one of four types of
lines: TI, North American PRI, ETSI
ISDN (E1), and European PRI (E1).
BRIM
Connects a maximum of four ISDN BRI
S/T interfaces.
—
GATM4/GATM8
Connects either four (GATM4) or eight
(GATM8) analog public switched
telephone lines to the BCM50 2.0
system.
—
ADID4/ADID8
Connects either four (ADID4) or eight
(ADID8) analog DID interfaces.
—
Note: See
on page 239 for supported regions.