Section 2: Components
36
Product Description
T1/PRI Interface Card (1PRIU) — P/N 0891009
For T1 and ISDN Primary Rate Interface (PRI) applications, install a
T1/PRI Interface PCB. This PCB has a single 24-channel 64Kb/s digital
signal circuit which can be con
Þ
gured for either T1 trunks or PRI. Each
PCB connects to the network via an NTI Network Termination.
If set for T1, the T1/PRI PCB gives the system 24 trunks in a single univer-
sal slot. These trunks can be one of the following:
●
Loop Start
●
Ground Start
●
DID
●
E&M Trunks
●
ANI/DNIS E&M Trunks
T1 gives the system the advantages of advanced digital trunking as well as conserving universal
slots. For example, a system with 12 loop start trunks, two tie lines and six DID trunks would use
up
Þ
ve universal slots. With T1 all these trunks would be available in a single universal slot, freeing
up four additional universal slots for other uses.
If set for PRI, each T1/PRI PCB provides 24 PRI (23 B& 1 D) channels running at 1.544Mbps with
64Kb/s clear channel. The PCB supports the following PRI services:
●
Basic PRI Call Control (BCC)
●
Display of incoming caller’s name and number (when allowed by the telco)
●
Speech and 3.1 KHz audio
When installed, the T1/PRI Interface PCB uses the
Þ
rst available block of 24 consecutive trunks.
For example, if you have an COIU PCB installed for trunks 1-8, the T1/PRI Interface PCB will
automatically use trunks 9-32. If you have COIU PCBs installed for trunks 1-8 and 17-24, the T1/
PRI PCB will use trunks 25-48. The T1/PRI Interface PCB cannot use trunks 9-16 (even if avail-
able) since they are not part of a consecutive block of 24 trunks.
The T1/PRI PCB requires one universal slot and provides a Block switch to busy out the PCB.
When used for T-Bus, up to 8 PCBs can be installed in the system. When used as S-Bus, up to 10
PCBs can be installed.
4 DID/OPX (4DIOPU) Card — P/N 0891013
The 4DIOPU PCB supports the analog DID and single line telephone interface functions (such as
Off-Premise Extension). The function type is assigned in programming for each port. The circuit
types, however, should be grouped together. For example, with 3 DID circuits and 1 OPX circuit,
they should be grouped as DID, DID, DID and OPX and not DID, DID, OPX and DID.
The DIOPU PCB provides:
●
4 DID trunk circuits
●
4 DID trunk status LEDs
●
1 PCB status LED
●
1 run/block switch
The CN3 connector provides connection to 4 analog DID trunk ports,
which are polarity sensitive
(tip to tip, ring to ring)
. The OPX circuits, however, are not polarity sensitive. The DIOPU requires
one universal slot, with 15 maximum PCBs per system. When used only as DID, the PCB con-
sumes 4 trunk ports. If OPX trunks are de
Þ
ned in Program 10-03-01 for the PCB, then 4 station
ports are assigned as well.