The GCD-PRTA PRI/T1/E1 blade provides an interface for E1 and ISDN
Primary Rate Interface (PRI) applications. This blade has a single
30-channel 64Kb per second digital signal circuit that can be configured for
either E1 trunks or PRI. Each blade connects to the network via an NTI
Network Termination.
If set for PRI, each PRI/T1/E1 blade provides 32 PRI (30 B & 2 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 30 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 25~56. The
GCD-PRTA cannot use trunks 9~16 (even if available) since they are not
part of a consecutive block of 32 trunks. Each GCD-PRTA requires 32 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.
Refer to the following tables for maximum upgrade capacities of the
GCD-PRTA blade