User's Manual
7-4 Preliminary May 9, 2000   APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide
Configuring T1 Cards
Overview of T1 configuration
“Configuring inband robbed-bit 
signaling” on page 7-11 
If the lines use inband signaling, change 
the signaling mode to robbed bit and 
specify the type of robbed bit signaling 
to use. You can also specify that the 
TAOS unit process the numbers dialed 
for use with Dialed Number 
Identification Service (DNIS) and 
Calling Number Identification (CLID) 
authentication.
Signaling-Mode
Robbed-Bit-Mode 
Collect-Incoming-Digits
DSP-DTMF-Input-Sample-Count
“Configuring NFAS” on 
page 7-13
Specify non-facility associated signaling 
(NFAS) if you want two or more PRI 
lines to share a D channel. 
Switch-Type
NFAS-ID
NFAS-Group-ID
“Configuring T1 R1 and 
R1-Modified (Taiwan) with ANI 
and called-number processing” 
on page 7-15
R1 is a multifrequency inband signaling 
system that uses a set of register signals 
known as MFR1 tones as addressing 
signals. R1 signaling can optionally be 
used with Automatic Number 
Identification (ANI), which is similar to 
Caller ID (CLID). 
Signaling-Mode
R1-Use-ANIR 
R1-First-Digit-Timer
R1-ANIR-Delay
R1-ANIR-Timer
R1-Modified
“Configuring clocking” on 
page 7-17 
Set Clock-Source to specify whether the 
T1 line can be used as the master clock 
source for synchronous connections. 
Also specify the priority of the T1 lines 
to be used for clocking. 
Clock-Source
Clock-Priority 
“Configuring the front-end 
transceiver” on page 7-17
Set the front-end type of the T1 
transceiver to CSU (channel service 
unit) or DSX (digital signal cross 
connect), depending on the type of 
device the TAOS unit connects to. 
Front-End-Type 
DSX-Line-Length
CSU-Build-Out 
“Configuring channel usage” on 
page 7-18
Specify how each of the 24 channels of a 
T1 line is to be used. 
Channel-Usage 
“Assigning telephone numbers 
to switched channels” on 
page 7-19 
Typically, you specify only the 
rightmost digits necessary to distinguish 
one number from another. These are 
called add-on numbers. 
Phone-Number 
 “Configuring trunk groups” on 
page 7-20 
A trunk group is a group of channels that 
has been assigned a number. 
Trunk-Group 
Table 7-1. T1 line configuration tasks (continued)
Section  Description of task Associated parameters










