1.px0.dffxrak
Description
The 1.px0.dffxrak card provides circuits to drive three auxiliary cabinets (expansion
cabinets). It used in three- and four-cabinet PX24X Hybrid IP PBX systems, which do
not require E1 interfaces.
Number of units per system
There can be only one DFF card in any type per system.
Location
Main cabinet (2.pxf.urnxmkn or 2.pxf19inmkn), the first slot to the right of the power
supply unit. Mounted over the control and switching unit (2.px0.ipbxdfl).
1.px0.dffx1e1
Description
1.px0.dffx1e1 is a 2.048 Mbit E1 (ITU-T G.703) digital interface card providing one
E1.The E1 can connect to 120 ohm balanced (or optional 75 ohm unbalanced)
terminations. The clock of the PX24X Hybrid IP PBX system can be programmed to
synchronize with the E1 or it may run freely. The line code is programmable as AMI
or HDB3. Cyclic redundancy check (CRC4) can be enabled or disabled for the E1
interface. The direction of each channel of the E1 can be programmed as incoming,
outgoing, both-way, or unavailable and therefore yields fractional E1 connection. The
types of signaling / protocol available for the E1 interface are:
•
Channel-Associated Signaling (CAS)
•
Single-bit E&M emulation
•
Two-bit ITU-T R1
•
Two-bit ITU-T R2
•
Many variations of signaling types (such as CL-1B, OCL-1B, TCL-
1B, SL/ZSL, SLM) widely employed in CIS countries
•
Common-Channel Signaling (CCS)
•
DSS1 (Euro-ISDN in the TE direction)
•
DSS1 (Euro-ISDN in the NT direction)
•
ECMA QSIG (in the TE direction)
•
ECMA QSIG (in the NT direction)
•
ITU-T Signaling System No.7 ISUP
•
V5.2 LE and AN protocol
In addition to the E1 interface, the card provides circuits to drive up to three auxiliary
cabinets in a system.
License
Depending on the signaling / protocol type for the E1 interface, one of the following
licenses is required.
•
w.pxf.lscxv52
13
