DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Hardware Configurations
2-10PNC Cabling — Fiber Hardware
2
EI-to-SNI or EI-to-EI Intracabinet Metallic
Cabling
Metallic cable may be substituted for optical cable for “fiber” connections
between EIs or between an EI and an SNI in the same MCC cabinet. The same
I/O plate connectors are used. The metallic cables should not be used for
intercabinet connections, since doing so violates system ground integrity. The
metallic cable comes in two lengths.
DS1 CONV Cabling
Digital services (DS1) can be used to connect PNs that are up to 100 miles (161
km) apart when fiber optic cabling is not practical. Multi-mode (fiber-connected
PNs must be less than 25,000 feet (7620 m) and less than 22 miles (35.4 km) for
single- mode fiber from the PPN.) A TN574 or TN1654 DS1 Converter (DS1
CONV) circuit pack serves as the interface between the network and an EI or SNI
on the switch. DS1 cabling on a carrier consists of a Y-cable that connects a DS1
CONV to an EI or SNI and to the network. The following cables may be used,
depending upon where the DS1 CONV and the EI or SNI are located:
Part No. Length Intended use
H600-278,G1 13 inches (33
cm)
From an EI in slot 1 of a switch node carrier to an
SNI in the same half of the carrier (usually the
adjacent slot)
H600-278,G2 66 inches
(168 cm)
From an EI to an SNI in the same cabinet, but in a
different carrier or different half of a carrier
Connection Type Length
Comcode
Number
TN574
Comcode
Number
TN1654
On same half carrier 1 foot (30.48 cm) 846448637 847245750
On different half
carriers in same
cabinet
5.5 feet (1.68 m) 846448645 847245768
Between two
adjacent cabinets
1 foot (30.48 cm),
used with two
9823As, and 1
20-foot (6.1 m) fiber
optic cable
846448652, and
one 846885259
bracket
847245776 with
one 846885259
bracket
