User guide

System Administrator’s Guide – Release 7.5
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Toll Free 1-866-ALLWORX • 585-421-3850 • www.allworx.com
Revised: April 9, 2013
Page 110
13.3.6 Limitations with SIP Outside Lines
The following calling features are not available when using SIP trunks or SIP
Gateways:
• Consultation and call transfer (using *# or *7) by recipients of Follow-Me-
Anywhere call routes.
• Disconnection (hang up) of calls (using *#) when accessing outside lines through
the Message Center.
However, these features ARE available when one of the parties in the call is using an
Allworx phone or port expander.
13.4 Digital Lines
Allworx refers to the integrated T1 interfaces on Allworx 24x and 48x servers as Digital
Lines. The Allworx 24x and 48x servers have two T1 Digital Line interfaces that are
accessed through the connectors labeled T1-A and T1-B. There are differences in T1
port functionality between the 24x and 48x servers.
13.4.1 Allworx 24x
The T1-A interface can operate as a Primary Rate ISDN line and/or as a T1 data line
for connectivity to another site or to an Internet Service Provider. That is, the T1-A
interface supports both circuit switched voice calls and TCP/IP data. The T1-A
interface also supports Robbed Bit Signaling (RBS) operation. The T1-B interface is
dedicated for use as a data connection. Use the data connection for connectivity to
another remote site on a dedicated T1 line or for connectivity to a service provider for
Internet access.
13.4.2 Allworx 48x
One or both of the T1 interfaces can operate as Primary Rate ISDN lines, Robbed Bit
Signaling (RBS) lines and/or as T1 data lines for connectivity to another site or to an
Internet Service Provider. That is, the interfaces support both circuit switched voice
calls and TCP/IP data. Use the data connection for connectivity to another remote site
on a dedicated T1 line or for connectivity to a service provider for Internet access.
13.4.3 PRI Support
The Allworx server supports Primary Rate ISDN using the National Standard ISDN
format (NI-2), Lucent Custom 4ESS, Lucent Custom 5ESS, and Nortel DMS-100
switch types. Always configure the Allworx server ISDN interface as the user side
equipment with the intention of hooking to the service provider’s Central Office (CO)
network side equipment. The Allworx server interfaces have a fully integrated
CSU/DSU and are typically intended for direct short haul connection to the service
provider’s smart jack. Consult the product installation instructions for further
information.
Note: When using PRI operation it is important to define exactly one PRI D channel for
the Digital Line and a minimum of one PRI B channel. The configuration must