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PEC
Products
>> CardSaver Protocols Supported
E&M
· E&M Type I signaling uses two leads, E and M, which
share a common ground path. This signaling type is commonly used
with electromechanical switching systems. Most electronic systems
do not use it due to the noise induced by the common ground path.
· The Type II interface is designed for use with electronic
switching systems. It uses four wires, a pair for the E lead and
a pair for the M lead. The signaling system is fully looped with
the CU and SE having independent batteries and grounds. The SE controls
the E lead and the CU controls the M lead.
· The E&M Type V interface is widely used outside North
America. It can be used in SSDC5A type circuits on the IDNX. This
interface is an unbalanced version of E&M Type IV signaling
from the trunk circuit to the signaling facility is over the M lead;
signaling in the reverse direction is over the E lead. Local ground
is used for off-hook instead of the ground obtained from the SB
or SG lead. This makes this interface a two-wire type
ISDN
· Integrated services digital network, an international
communications standard for sending voice, video, and data over
digital telephone lines or normal telephone wires. ISDN supports
data transfer rates of 64 Kbps (64,000 bits per second).
R2 MFC
· Each protocol is parameterized, giving developers the
ability to adapt the protocol to multiple target environments
worldwide. The MFC-R2 protocol states and events are identical
for all countries, but certain parameters, such as tone duration,
vary.
Last updated on January 21, 2004.
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