NC-AD300E Manual
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5.2.4.2 PCM property
Set the relevant properties of PCM. In the INDEX area select the "PCM", Pamameter area
shows as below:
PcmID, PCM's number, see the hardware description.
Line impedance, E1 lines using coaxial cable connection typically use two kinds of 120-ohm or 75
ohm impedance.
(if device interface is CC4 small head ,you can only us 75 ohm )
CRC4 check, physical frame of the 4-byte cyclic redundancy check. Normally enable.
Signaling type, set the signaling type of PCM
.
AD300E supports the following signaling.
A) ISDN PRI, or Primary Rate ISDN (Primary Rate Access), also known as Digital One
(DSS1) signaling, the domestic usually 30 B channels plus one D channel (30B + D)
approach.
B) SS7 signaling, SS7 signaling is a common international standard for common channel
(Common Channel) signaling system, which uses a layered functional structure and message
communication mechanism, the most suited for the use of modern digital communication
network. Currently AD300E support TUP (Telephone User Part) and ISUP (ISDN User
Part).
C) V5.2, to connect AN (Access Network) access network and the LE (Local Exchange) the
local exchange network V-interface.
Signaling parameters:signaling related to the detailed parameters.
ISDN PRI signaling has the following parameters:
Network mode: two options, the network side or user side. can not be the same at both ends.
