Zhone IMACS 8000, User Manual

Page: 368 / 788

11-8 Voice Cards
Model No.
Running Head
E&M Card User Screens and Settings E&M Card
R2 TYPE
The R2 Type setting is
reserved for future use; its setting is always
set to n/a
and cannot be changed.
when the Mode is set to e&m or to. The signaling type for all eight E&M ports is established
by setting hardware switches S1 through S4 as described earlier. If the Mode selected for the
port is e&mR2 or R2mod, the R2 Type automatically defaults to sl-1.
Rx TLP
The Receive Transmission Level Point (TLP) setting controls the amount of gain or loss added
to a signal after it is decoded to analog. To increase the signal level, set the Rx TLP field to a
positive number (i.e., the larger the number, the more gain is added). To decrease the signal
level, set the Rx TLP field to a negative number (i.e., the more negative the number, the more
the signal level is decreased). For example, an incoming signal at -5 dBm can be increased to
-2 dBm by setting Rx TLP to +3 dB. The Rx TLP range is -16.3 dB to +7.5 dB.
Tx TLP
The Transmit TLP setting controls the amount of gain or loss added to the voice signal coming
in from the local CPE before it is encoded to digital PCM. To increase the incoming signal
level, set the Tx TLP field to a negative value (i.e., the more negative the number, the more
gain is added). To decrease the signal level, set the Tx TLP setting to a positive number (i.e.,
the more positive the number, the more the signal level is decreased). For example, an
incoming signal at -16 dBm can be increased to 0 dBm by setting Tx TLP to -16 dB. For the
E&M 4W*8 Card, the Tx TLP range is -16.5 dB to +7.3 dB. For the E&M 4W*8 ER E&M
Card, this range is -17.5 dB to +14.5 dB.
CODING
The Coding field sets the PCM companding (coding) method used for a port. Generally, the
North American T1 environment uses u-law (mu-law) coding, and the International E1
environment uses either a-law or a-inv (inverted A-law) coding. The a-inv setting provides a
higher ones density on an E1 line than a-law. The coding default setting is defined by the type
of associated WAN card.
TC CGA
The Trunk Conditioning during Carrier Group Alarm setting defines whether the E&M card
port should be placed in the idle or busy mode upon declaration of a Carrier Group Alarm
(CGA) on the WAN link to which the port is assigned. The TC CGA setting has no effect on
Transmission-Only circuits, for which the to signaling mode is used.