Chapter 5 Setup Menu FCD-IPM Installation and Operation Manual
5-48 Interface Parameters Menu
E&M Type
This parameter specifies the E&M signaling mode:
Type1
Type2
Type3
Type5 – SSDC5.
Coding law
Select this parameter to specify the compounding law to be used by the voice
channels. The values are:
µ Law Coding – for T1 links.
E signal from the T1 On
Select this parameter to specify the E signal receive mode from T1 into E&M. The
values are:
A bit When the received A bit signal from T1 equals 1 then the E signal will be
activated in the E&M interface
When the received A bit signal from T1 equals 0 then the E signal will be
inactivated in the E&M interface
A bit inverted When the received A bit signal from T1 equals 0 then the E signal will be
activated in the E&M interface
When the received A bit signal from T1 equals 1 then the E signal will be
inactivated in the E&M interface
B bit When the received B bit signal from T1 equals 1 then the E signal will be
activated in the E&M interface
When the received B bit signal from T1 equals 0 then the E signal will be
inactivated in the E&M interface
B bit inverted When the received B bit signal from T1 equals 0 then the E signal will be
activated in the E&M interface
When the received B bit signal from T1 equals 1 then the E signal will be
inactivated in the E&M interface.
Default ABCD to the T1
This parameter specifies the default signaling bits that are not used for the
M signal. Those bits will be transmitted towards T1.
Out of Service Method
This parameter specifies the E signaling state in E&M when an Out of Service
condition is indicated in the T1 link. The values are:
Forced Idle T1 signal is held at inactive for the duration of the Out of Service condition
Forced Busy T1 signal is held at active for the duration of the Out of Service condition
Idle Busy T1 signal is held at inactive for 2.5 seconds, and then toggled to active
until the Out of Service condition end