Voice Trunk Board - Samsung OfficeServ 7070 System Description

2.3.2 Voice Trunk Board

2.3.2.1 PRM
The PRI Module (PRM) board provides digital trunks. It provides ISDN PRI and the Q-SIG
function as well. It provides voices through a trunk and transmits 64 kbps voice data per channel.
Key Functions
The PRM voice trunk board provides the following functions:

Selecting the PRI signal processing through programming
A resistance circuit satisfying both T1 (100 Ω) and E1 (120 Ω) at the same time


Surge protection safer than the level recommended by International Telecommunication
Union (ITU)

Output port protection through a line monitor

Jitter function meeting both of the ITU-T I.431 and G.703 specifications

Provides the selectable line codec (HDB3, AMI)

Local/Remote loop function

HDLC or Channel Associated Signaling (CAS) through Common Channel Signaling
(CCS)
Specification
The specification of the PRM voice trunk board is as follows:

PRI: 30 channels
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