15
Primary to Basic Rate ISDN Multiplexer
TECHNICAL: 0118 931 2233
LED's indicate power and alarm.
For each primary rate port the P LED is on when both physical link layer and data link layer
are active. It flashes when only the physical link is active. The B LED is on when any B
channel is in use.
For the Ethernet port the P LED indicates network present and the B LED indicates network
activity.
For the modem port, the P LED is on for off-hook and flashing for ringing. The B LED
indicates modem connected.
U and S cards
Figure 3
The Primary to Basic Rate ISDN Multiplexer U card and S card
The U and S cards feature 8 Basic Rate Ports and LED's.
Ports 1-8 are BRI 1-8 if fitted in the first line card slot or BRI 9-16 if fitted in the second line
card slot.
Pin-outs of the BRI interfaces are given in an appendix.
LED's indicate power and alarm.
For each port the P LED is on when both physical link layer and data link layer are active. It
flashes when only the physical link is active. The B LED is on when any B channel is in use.
A card
Figure 4
The Primary to Basic Rate ISDN Multiplexer A card
The A card features 16 analogue (PSTN) ports and LED's.
