COMpact 5200/5200R/5500R - Firmware V7.2 - Advanced Information V04 07/2018
1055
Glossary
Terminology
S
S
0
Basic Access
ISDN basic access with a maximum of two speech channels and one data
channel (D-channel). A difference is made between external and internal S
0
.
An external S
0
port can be used as PTP or PTMP connection. COMfortel
system phones, other ISDN devices and ISDN PC cards are connected to
the internal S
0
port. The internal bus acts as PTMP connection.
S
0
Port
ISDN port with two payload channels and a data channel. Two simultaneous
connections are possible on an S
0
port.
S
2M
Primary Rate Multiplex Access
A S
2M
primary rate multiplex access provides the PBX with up to 30 speech
channels (B-channels) and one data channel (D-channel). It is designed as
a PTP connection and can be operated in combination with ISDN basic
access connections (S
0
ports).