T1/Pri (1Priu) Interface Blade (Figure 2-40 - Figure 2-41); P/N 0911052 - NEC UX5000 Hardware Manual

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Chapter 2 - Blade Installation and Startup
2.7.7

T1/PRI (1PRIU) Interface Blade (Figure 2-40 - Figure 2-41)

The T1/PRI blade provides an interface for DS1, T1 and ISDN Primary Rate Interface (PRI) applications. This
blade has a single 24-channel 64Kb/s digital signal circuit which can be configured for either T1 trunks or PRI.
Each blade connects to the network via an NTI Network Termination.
If set for T1, the T1/PRI blade gives the system 24 trunks in a single universal 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 five 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 blade provides 24 PRI (23 B& 1 D) channels running at 1.544Mbps with 64Kb/s
clear channel. The blade 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
By default, the system programming has an installed T1/PRI blade defined as a PRI blade in system
programming. System programming is also used to define whether the connection is T-Point or S-Point.
When installed, the T1/PRI Interface blade uses the first block of 24 consecutive trunk ports. For example, if
you have an COIU blade installed for trunks 1-8, the T1/PRI Interface blade will automatically use trunks 9-32.
If you have COIU blades installed for trunks 1-8 and 17-24, the T1/PRI blade will use trunks 25-48. The T1/PRI
Interface blade cannot use trunks 9-16 (even if available) since they are not part of a consecutive block of 24
trunks. Each T1/PRI blade requires that 24 ports be available in the system, even if not all the ports will be
used, otherwise the blade will not function.
A maximum of 2 PRIU blades can be installed in the main chassis with the CPU. A maximum of 4 PRIU blades
(for T-Point or S-Point) can be installed in a 19" chassis with a CPU. With the CygniLink feature, a maximum of
8 PRIU blades can be used. The T1/PRI blade requires one universal slot and provides:
1.5M or T1 Function
2 - 82

- P/N 0911052

Chapter 2

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