Specifications

3-70 Reference Guide
Model No.
Running Head
Signaling and Companding (BCON) System Configuration and Operation
To change the signaling and/or companding options of a voice circuit on a WAN card using
the drop-and-insert mode, place the cursor over the time slot you wish to change and select I
(sIgnaling) from the Menu of Actions. Table 3-10 shows the matrix of choices for the handling
of signaling, signaling conversion and companding conversion.
Table 3-10. Signaling and Companding Options
The first option is Select Signaling. The choices are either
yes
or
no
, depending upon the type
of circuit passed through the system (voice or data).
Whichever choice is made, the system
will then prompt you to select PCM companding conversion.
The choices for Select PCM
CONV are
none
,
A-mu
(A-Law to Mu-Law, E1 to T1 conversion) and
mu-A
(Mu-Law to
A-Law, T1 to E1 conversion).
On a normal data service, you would probably choose
no
and
none
. A voice circuit on a
T1-T1 "pass through" might require signaling enabled but not converted, so the choices would
be
yes
(to pass voice signaling through), and
none
(the PCM does not have to be converted),
and
none
(the signaling does not have to be converted).
If, for instance, you have an international voice circuit passed through your system to a North
American T1 circuit, you would probably need to have both signaling and PCM conversion
converted. Choosing
yes
for Select Signaling will bring up your Select PCM CONV options,
followed by a prompt to select the signaling conversion for this circuit.
The first option is default signaling conversion (
none
) where a bit pattern of "0000" will
automatically be converted to "0001" in the T1 to CEPT direction.
The second option (
ANSI-CCITT
) will convert the incoming ANSI signaling to CCITT
signaling. The third option (
CCITT-ANSI
) converts the incoming CCITT signaling to ANSI
signaling. These two options are complementary (i.e. if either one is selected in one direction,
the other is automatically selected for the reverse direction).
The fourth option (
ABCD-ABAB
) will convert the incoming CEPT signaling to T1 signaling
for an ESF or D4 cross-connect. The fifth option (
ABCD-AB01
) will convert the incoming
T1 signaling to CEPT signaling for a ESF or D4 cross-connect. These two options are
complementary (i.e. if either one is selected in one direction, the other is automatically
selected for the reverse direction).
If signaling conversion is enabled for that circuit, you will then be asked to Select SIG TYPE.
The choices are
e&m
,
fxs
,
plar
and
fxo
. After this final choice, the screen updates the
signaling and conversion information on that circuit.
Select Signaling Select PCM CONV Select SIG CONV
Select SIG
TYPE
none (no choice)
yes none, A-mu, mu-A ANSI-CCITT, CCITT-ANSI,
ABCD-ABAB, ABCD-AB01
e&m, fxs,
plar, fxo
no none, A-mu, mu-A (no choice) (no choice)