4RF Aprisa XE User Manual - page 173
Cross Connections | 171
DFXS and DFXO Cross Connections
1. On one side of the link, expand the DFXS display, as required, by clicking .
2. On the other side of the link, expand the corresponding DFXO display, as required, by clicking .
3. For the DFXS card and corresponding DFXO card, select the Signalling type as required, according to
the table below. The CAS signalling between DFXO / DFXS interfaces uses 4RF proprietary allocation of
control bits.
The Signalling type affects both ports of the DFXO / DFXS interface. If a mixture of signalling types is
required, then multiple DFXO / DFXS cards are needed.
Signalling
Application
Overhead
Multiplexed
(default)
Multiplexers the four ABCD bits from the interface into a single 8
kbit/s channel.
Use when interworking DFXO to DFXS, between an XE and a SE
radio or when limited bandwidth is available.
This signalling type cannot be used for interworking between
framed E1 / T1 and voice interfaces.
8 kbit/s
Non-multiplexed
Transports each of the four ABCD bits in separate 8 kbit/s
channels.
Use when interworking DFXO to DFXS, or when signalling bits are
mapped into an E1 / T1 timeslot.
32 kbit/s
4 wire compatible 1 bit CAS using only the A bit in both directions of transmission.
Use when interworking the DFXS to Q4EM, DFXO to Q4EM, DFXS to
DFXS or DFXS to QJET for DTI circuits.
8 kbit/s
4. Set the Voice capacity and create the Voice connection by dragging and dropping between the
mapping connection boxes of the DFXO and DFXS corresponding ports.
5. Link the Port Signalling connection by dragging and dropping between the mapping connection boxes
of the DFXO and DFXS corresponding ports. The DFXO / DFXS control signals (off hook, ring, etc) will
not function without this connection.