User’s manual FlexGain Plex, V2
Version 1.3 12 from 99
Note: The unframed DIRECT mode (all TSs are mapped on the V.35 interface) is not
supported by the current software.
Electric parameters of E1 interfaces completely conform with the G.703
recommendations and the functional parameters comply with the ITU-T G.704
recommendations.
In PCM30 and PCM30C modes the signaling information about the status of voice
channels is transmitted, by default, in the sixteenth TS of the E1 stream. The device
supports single-bit (“Transparent”) signaling over one dedicated channel, two different
signaling methods over two dedicated channels: subscriber (“MMX”), “Definity®” signaling
and MEGATRANS signaling, which is transmitted in the subscriber time slot.
Note: The E&M signaling is to be ordered.
The signaling over one channel transmits the status of the subscriber loop in the bit
“a” of the signaling TS. The signaling over two channels uses bits “a” and “b” of the given
time slot. The MMX signaling is used to organize interaction between two devices, which
support this type of signaling (for example, FlexGain Plex, FlexGain Plex, V2, Nateks-
MMX, FlexDSL IAD). The signaling referred to as “Definity®” is used for direct digital
connection of the device over the E1 stream to the Definity® PBX of the G3R family with
the boards of digital connection lines (analogue lines) TN2464BP. The operation of the
device when it is connected digitally to other PBXs as well as to the equipment whose
software differs from the software specified in this document requires additional connection
works.
Note: “Definity®” is the registered trademark of the Lucent Technologies corporation.
To transmit signaling information over incomplete E1 channels, when the number of
time slots is less than sixteen, the devices supports the mutual interchange of TS No. 16
with any other time slot except for the zeroth time slot. The embedded means of
diagnostics and error statistics complying with the ITU-T G.826 Recommendations allow
one to calculate the availability and unavailability time of the channel and to estimate:
• The number of errors in the cyclic redundancy check;
• The number of errored frame and multiframe alignments;
• The number of errored seconds;
• The number of severely errored seconds;
• To calculate the coefficients of the cyclic redundancy check and errored
seconds.
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