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Introduction to the ISDN Interface
CSU Equipment
The installer must provide a Channel Service Unit (CSU) plus CSU cabling.
The CSU equipment must meet the specifications contained in Table 1-3. See
page 2-12 for instructions on installing the CSU.
Table 1-3. CSU equipment required for ISDN
Item
CSU
The Channel Service Unit (CSU) must
comply with FCC Part 15 and Part 68. The
CSU is installed between the DBS and the
public network. The CSU provides alarm,
diagnostic, and monitoring functions, as
well as network protection.
CSU
Each CSU requires a network cable and an equip-
ment cable. The network cable connects from the
Cabling
CSU to the network interface. The equipment cable
connects from the CSU to the DBS ISDN MDF
card.
For Kentrox CSUs
The network cable requires a female DB-15 con-
nector and an RJ48C connector. The equipment
cable requires a male DB-15 connector and an
RJ48C connector.
To simplify installation, you can order the prefabri-
cated cables shown in the "Vendors" column.
If you fabricate your own ISDN cables, you should
use 24 AWG stranded cable that includes shielding
for each pair. For best results, use the cable listed
under "Vendors."
For Premier CSUs
You must fabricate your own cables for the Premier
CSU. The network cable requires two RJ48C con-
nectors. The equipment cable connects to an RJ48C
connector on the ISDN MDF card and to four
screw-down terminals on the CSU.
For both cables, use 24 AWG stranded cable that
includes shielding for each pair. For best results,
use the cable listed under "Vendors."
Revised April 2000
Specifications
DBS-EX23-530
Pre-Installation Requirements
Vendors
The following CSUs have been used suc-
cessfully with the DBS ISDN.
Kentrox
Kentrox T-SERV II
or
Kentrox T-SMART
(Kentrox can be contacted at 1-800-733-
5511.)
For Kentrox CSUs
Kentrox offers prefabricated cables for their CSUs.
For the network cable, order part number 01-
93010151. For the equipment cable, order part
number 01-93010121.
If you fabricate your own cables, use 24 AWG
stranded cable that includes shielding for each pair.
Belden (Richmond, IN) offers stranded cable that
complies with these specifications. Order part
number 8723.
1-9
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