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The REN is used to determine the number of devices that may be connected to the
telephone line. Excessive RENs on the line may result in the devices not ringing in
response to an incoming call. In most, but not all areas, the sum of RENs should not
exceed five (5.0). To be certain of the number of devices that can be connected to the
line, as determined by the total RENs, contact the local telephone company.
If your unit causes harm to the telephone network, the telephone company may
discontinue your service temporarily. If possible, they will notify you in advance. But if
advance notice is not practical, you will be notified as soon as possible. You will be
advised of your right to file a complaint with the FCC.
Your telephone company may make changes in facilities, equipment, operations, or
procedures that could affect the proper operation of your equipment. If so, you will be
given advance notice so as to give you an opportunity to maintain uninterrupted
service.
No repairs may be performed by the user. Should you experience difficulty with this
equipment, refer to the
Warranty, Sales, Service, and Training Information on page 28.
Make the T1 network connection using a Universal Service Order Code (USOC) type
RJ48C jack for single-line installations and type RJ48H jack for multiline installations.
Specify both the Service Order Code 6.0F, as well as the proper Facility Interface
Code, to the telephone company when ordering the T1 line. The T1 equipment can be
configured to support any of the framing format and line signaling techniques shown in
the table below. The T1 equipment’s configuration must correspond to the T1 line’s
parameters.
T1 Facility Interface Codes
Interface Code
Description
04DU9-BN
1.544 Mbps superframe format (SF) without line power
04DU9-DN
1.544 Mbps SF and B8ZS without line power
04DU9-1KN
1.544 Mbps ANSI ESF without line power
04DU-1SN
1.544 Mbps ANSI ESF and B8ZS without line power
Make the ISDN PRI connection using a USOC-type RJ48C jack. When ordering an
ISDN line from the telephone company, specify the following:
Service Order Code 6.0F
Facility Interface Code 04DU-1SN
Up to 23B Service for an ISDN PRI DBM – Supports up to 23 circuit-switched
B-channels, with one local phone number for the entire T1 network connection.
Circuit Switched Data capability should be specified.
