Cables and Connectors
T1/PRI interface specifications
MultiVoice Gateway for the MAX— User’s Guide
Preliminary November 23, 1998
D-5
T1/PRI interface specifications
This section provides the specifications for the MultiVoice Gateway unit’s T1/PRI interface
and covers cabling requirements.
T1/PRI CSU requirements
T1/PRI requirements differ depending on whether a T1/PRI port on the MultiVoice Gateway is
equipped with an internal Channel Service Unit (CSU).
Port with internal CSU
If a T1/PRI port on the MultiVoice Gateway has an internal CSU, you can connect the port
directly to the metallic interface of the WAN.
To avoid harming the WAN, you must contact your carrier for approval before installation.
Once you install the MultiVoice Gateway, you must notify the carrier before disconnecting the
MultiVoice Gateway from the WAN. If you disconnect or turn off the MultiVoice Gateway
without prior notification, the carrier might temporarily discontinue your T1/PRI service.
The MultiVoice Gateway unit’s internal CSUs are compatible with dry-loop T1/PRI lines, and
with span-powered or wet-loop powered T1/PRI lines.
Port without internal CSU
A T1/PRI port of the MultiVoice Gateway that does not have an internal CSU cannot connect
directly to the WAN.
You must connect the port to other equipment that provides the interface to the WAN (for
example, an external CSU). Your carrier determines the correct value for the line buildout
