Configuring The Secondary/Fractional T1/Dsx-1 Interface - Lucent Technologies SLC ConnectReach User & Service Manual

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Configuring the SLC ConnectReach
Using the Configuration Commands
Configuring the Secondary/Fractional
T1/DSX-1 Interface
Introduction
Key commands
™
System
A secondary/fractional T1/DSX-1 interface can be used to connect the SLC
ConnectReach system to a voice or data system by means of a fractional
daughter card. The secondary/fractional T1/DSX-1 interface can also be used to
connect a stand alone ConnectReach system as a slave to support up to 24
additional foreign exchange station (FXS) lines. Examples of voice systems are
key system, PBX, or channel bank. A data system is connected by means of a
CSU/DSU and a router.
If the secondary/fractional T1/DSX-1 interface will be used to connect the SLC
ConnectReach system to the telephone system, you must determine how the T1
service has been configured in the PBX or key system.
The key commands that must match the PBX or key system's configuration are as
follows:
Framing Format
Line Coding
The SLC ConnectReach system offers the two most
common T1 framing formats: Extended Superframe
(ESF) and Superframe (SF or D4).
The T1 line coding formats offered by the SLC
ConnectReach system are bipolar 8 zero substitution
(B8ZS) and alternate mark inversion (AMI). T1 line
coding determines how the T1 requirement for ones
density is handled. In every eight bits of information, at
least one pulse must be present. If the T1 service uses
AMI line coding, it is important to enable the pulse
density enforcement option (described on next page).
If the T1 service uses B8ZS line coding, a bipolar
violation (BPV) is automatically inserted in place of a
string of eight zeros during transmission. At the
receiver, the original data stream is regenerated as a
result of the BPV. In this configuration, the pulse
density enforcement option is ignored.
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Issue 4 June 2002 4-27