Chapter 1 General Information
MX-2100/2104
Installation and Operation Manual
1-30 Application Considerations
MX-2100
MX-2100
Modem
Modem
KCL
KCL
I/O Mo
d
u
le
s
I/O Mo
d
u
le
s
KML.4
KML.10
KML.4
KML.10
Active Link
Switched
Data
Network
Switched
Backup Link
Figure 1-18. Typical ISDN Switched Backup Application
The algorithm works by automatically aligning (i.e., synchronizing and equalizing
the transmission delays) the two B channels, a process which uses FIFO buffers that
can store data for intervals of the same order as the maximum differential delay to
be corrected. The alignment process is performed when communication is first
established between the two MX-2100 units, and is repeated each time a loss of
main link synchronization occurs, or one of the MX-2100 units is reset (FIFOs are
also reset when one of these events occurs). Typically, the channel alignment
process requires up to 20 seconds.
The KML.10 module can use various structured leased line services (S0), such as
the FV0 Type 4 service available in Germany, and can be configured by the user
for optimal support of the following specific ISDN implementations:
•
ETSI (Euro-ISDN) NET3
•
AT&T 4ESS and 5ESS ISDN switches (custom multipoint, and point-to-point
services)
•
Northern Telecom DMS-100 ISDN switch
•
Bellcore ISDN switch NI1
•
NTT (Japanese ISDN version).
Switch Mode
MX-2100 provides a dial-up mode of operation that enables users to allocate ISDN
basic access lines via the KML.10 module card. The ISDN line is allocated to Main
Link A or, for MX-2100 only, Main Link B depending upon the configuration.
MX-2100 can be configured to operate in one of the following switch modes:
•
Single Switch Mode (MX-2100 and MX-2104)
- The local MX-2100 is
connected to a remote MX-2100 via an ISDN network allocated on a single
main link (either Main Link A or Main Link B). Refer to