![background image](http://html1.mh-extra.com/html/3com/3c10111c-nbx-100-modular-exp-base/3c10111c-nbx-100-modular-exp-base_installation-manual_440792187.webp)
ISDN PRI Prerequisites
187
■
CSU
— An external CSU (Channel Service Unit) is required with each
T1 installation. Many CSUs support conversion of ESF (with B8ZS)
services into D4 (with AMI). In some locations it may be easier to order
the T1 as ESF with B8ZS and perform the conversion in the CSU. You
must verify that the CSU supports this conversion.
ISDN PRI
Prerequisites
Before you install and configure ISDN PRI services on T1 circuits, gather
the following information and have it available at the time of installation:
■
All telephone numbers to be activated
■
PRI circuit ID
■
Carrier’s testing department name and telephone numbers
■
Carrier’s circuit provisioning department names and numbers
■
Carrier’s account representative account information
■
Requested smart jack be installed in customer’s suite (not at the
minimum point of entry)
CSU Required
Each PRI installation requires an external Channel Service Unit (CSU).
ISDN PRI
Recommendations
For ISDN PRI services, 3Com recommends the settings discussed in the
following sections.
■
Framing Type
— The recommended (also the default) configuration
is Extended Super Frame (ESF).
The multi-frame formats F4, F12 (D4 or SF), and F72 are also
supported.
■
Zero Code Suppression
— The recommended (also the default)
configuration is B8ZS.
AMI is also supported, but 3Com does not recommend this choice.
■
DID Applications
— For DID or DNIS, 3Com recommends that you
order telephone numbers that easily fit in the NBX system numbering
plan. If possible, use 3 or 4 digit DID/DNIS codes, which allow for
simple dial plan implementation.
Summary of Contents for 3C10111C - NBX 100 - Modular Exp Base
Page 20: ...20 ABOUT THIS GUIDE ...
Page 102: ...102 CHAPTER 2 INSTALLING SYSTEM HARDWARE COMPONENTS ...
Page 122: ...122 CHAPTER 4 ANALOG LINE CARDS ...
Page 132: ...132 CHAPTER 5 ANALOG DEVICES ...
Page 138: ...138 CHAPTER 6 BRI ST DIGITAL LINE CARD ...
Page 144: ...144 CHAPTER 7 E1 ISDN PRI DIGITAL LINE CARD ...
Page 150: ...150 CHAPTER 8 T1 DIGITAL LINE CARD ...
Page 184: ...184 APPENDIX A SPECIFICATIONS ...
Page 190: ...190 APPENDIX B CIRCUIT PROVISIONING ...
Page 206: ...206 INDEX ...