Instruction manual

Universal Slot PCBs
CO Line PCBs
Strata DK General Description 6/00 43
Voice Over IP Gateway (BVPU)
The BVPU combines the functions of a four-circuit REMU E&M Tie line card and a Voice Over
Internet Protocol (IP) gateway on a single PCB. The BVPU is an H.323 Version 2 compliant
gateway and can interoperate with other H.323 devices as well as other BVPUs. The BVPU allows
multiple Strata DKs to establish virtual Tie line connections across an IP network. The BVPU
connects to the LAN through an RJ45, 10BaseT connection. An RJ21 jack provides a serial
maintenance connection. This connection must be used to initiate the card. Once an IP address
has been established, maintenance may be performed through the LAN connection.
T1/DS-1 Interface Unit (RDTU2)
The RDTU provides either 8, 16 or 24 digital voice channels that can be individually configured
for ground start CO line operation, loop start CO line operation, DID/DOD line operation (with
hookflash) or Tie line operation (8 or 12 on DK40i). The number and type of channels for each
RDTU installed is assigned in system programming. All RDTU line types are two-way and can be
used for incoming and outgoing calls.
Any RDTU, DID/DOD, or Tie channel can be configured in system programming to receive DNIS
and/or ANI information from long distance carriers.
The RDTU normally requires the installation of a Channel Service Unit, which is not supplied by
Toshiba. RDTU T1/DS-1 digital voice channels can be configured for SF or ESF format and either
AMI or B8ZS line coding (see Table 28).
The RDTU2 supports the hook flash capability. “SuperTrunk” requires hook flash operation on T1
two-way DID/DOD lines. The RDTU1 can be upgraded to support hook flash.
In most locations within the U.S., network connection using RDTU2 requires a dealer-supplied,
UL-listed external CSU or in Canada, a CSA-certified CSU.
ISDN Primary Rate Interface Unit (RPTU)
The Primary Rate Interface Unit is a 24-channel PRI card, which provides 1 data (control) channel
and 23 bearer channels. All B channels appear and program as CO lines in the DK424i systems
and can be individually configured for local service, FX, WATS, DID, Tie, etc., service operation.
Network connection using the RPTU requires a dealer-supplied, UL-listed, external CSU in most
locations in the U.S. In Canada, the CSU/DSU must be CSA certified.
See “ISDN Primary Rate Interface (PRI)” on Page 79 for more information.
ISDN S/T-type Basic Rate Interface Unit (RBSU)
The Basic Rate Interface (BRI) Unit provides two BRI S/T circuits. Each circuit provides two
simultaneous voice and/or data connections with a single interface. BRI uses the 2B+D
transmission format which is defined as two 64-kbps bearer channels and one 16-kbps data
(control) channel. The D channel carries call setup control data.
The RBSU BRI circuits can be connected to ISDN BRI network lines and/or ISDN S-type
Terminal Equipment (TE-1) or Terminal Adapters (TA) on the station side.
The RBSU/RBSS BRI circuits that are configured for the station side provide a passive bus that
enables up to two TE1 and TA devices to be connected to one BRI circuit. When multiple TE1 and
TA devices are installed on a singled RBSU/RBSS BRI circuit, the devices must share or contend
for that circuit’s two B channels.