Dbu Module (P/N 1204002L3); Isdn Bri Dbu Module (P/N 1204004L2); Isdn Pri Dbu Module (P/N 1204008L2); Dce Dbu Module (P/N 1204006L2) - ADTRAN IQ 710 System Manual

61202800L1-1B
IQ 710
Section 1, System Description
Page 18
The IQ 710 Dial Backup (DBU) Modules provide single or multiple site backup, depending on the DBU
Module option selected. The IQ 710 can be configured to originate a call based on physical layer conditions
(i.e., port failures) and/or PVC outages. Once the criteria are met, the IQ 710 establishes a call to the config-
ured phone number and the connection is used to carry traffic for the PVC(s) configured for DBU operation.
V.34 DBU Module (P/N 1204002L3)
The V.34 DBU Module provides switched backup of the leased line application. This module allows
backup data rates of up to 33.6 kbps over the public switched telephone network (PSTN).

ISDN BRI DBU Module (P/N 1204004L2)

The ISDN BRI DBU (basic rate interface dial backup) Module supports a U-interface to the Basic Rate
ISDN and is compatible with National ISDN, Lucent 5ESS, DMS 100, and NEC. When a T1/FT1 or T1/
FT1 + DSX-1 Network Interface Module is installed, the ISDN BRI DBU Module provides a 2B+D Basic
Rate ISDN service. When a 56k/64k Network Interface Module is installed, the ISDN BRI DBU Module
provides a 1B+D Basic Rate ISDN service.

ISDN PRI DBU Module (P/N 1204008L2)

The ISDN PRI DBU (primary rate interface dial backup) Module allows the IQ 710 to accept or place up
to 23 dial backup calls simultaneously. This module supports 64 kbps data service. Incoming calls will be
accepted for 56 kbps or 64 kbps service. Bonding is not supported. Fractional PRI capability is supported.

DCE DBU Module (P/N 1204006L2)

The DCE DBU Module connects the IQ 710 to an external DBU device such as an ISDN terminal adapter.
The DTR signal lead is used to initiate dial backup through the DCE DBU Module. The IQ 710 supports
up to 512 kbps of backup service using the DCE DBU Module.
IQ 710 System Manual © 2002 ADTRAN, Inc.