OfficeServ 7070 System Description/Ed.02OfficeServ 7070 System Description/Ed.02
© SAMSUNG Electronics Co., Ltd.
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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
