NEC Univerge SV9100 System Hardware Manual page 326

4-76
If set for T1, the T1/PRI blade provides 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 provides advanced digital trunking and conserves universal slots. For
example, a system with 12 loop start trunks, two tie lines and six DID trunks
uses up to five universal slots. With T1, all these trunks are available in a
single universal slot. This frees 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. This 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

When installed, GCD-PRTA uses the first block of 24 consecutive trunk
ports. For example, if a COIU blade is installed for trunks 1~8, the
GCD-PRTA automatically uses trunks 9~32. If the COIU blades are
installed for trunks 1~8 and 17~24, GCD-PRTA uses trunks 25~48. The
GCD-PRTA cannot use trunks 9~16 (even if available) since they are not
part of a consecutive block of 24 trunks. Each GCD-PRTA requires 24 ports
in the system, even if not all the ports are used, otherwise the blade does
not function.
The GCD-PRTA requires one universal slot and provides:
1.5M or T1 Function

Refer to the following tables for maximum upgrade capacities of the
GCD-PRTA blade:
Table 2-6 SV9100 Maximum 9.5" Gateway and 19" System

Capacities – Blades on page 2-12
Table 2-7 SV9100 Maximum 9.5" Base and Expansion System

Capacities – Blades on page 2-14
Issue 3.0
Installing the SV9100 Blades