Specifications

TN2242 digital trunk
Issue 6 February 2007 255
The following table lists the TN2224-supported telephones and shows each of their wiring sizes
and ranges.
TN2242 digital trunk
The TN2242 digital trunk circuit pack supports versions of channel-associated signaling and
ISDN-PRI signaling. These signaling versions are peculiar to the TTC private networking
environment that is used in Japan. The TN2242 supports the special line-coding and framing
that are used on 2.048-Mbps Japanese trunks. The TN2242 connects the switch with other
vendor equipment and with other DEFINITY switches through the TDM device. The TDM device
is commonly used throughout Japan for this purpose.
TN2301 logic switch
The TN2301 provides service to the customer when one of the following is true:
● the link to the main processor fails
● the link to the main processor is severed
● the processor or Center Stage Switch (CSS) fails
The TN2301 Survivable Remote Switch (SRS) circuit pack connects the expansion port network
(EPN) links to the appropriate processor port network (PPN) for call processing. The EPN links
can be fiber or T1/E1. This connection is under the control of the TN775C Maintenance circuit
pack which monitors the health of the expansion interface TN570B.
The TN2301 logic switch circuit pack is not used in an ATM-PNC.
Telephone Wire size (AWG) Maximum range
(feet)
302C/D console 24 (0.2 mm
2
/0.5 mm) or 26 3,500 (1,067 m)
Callmaster-series 24 (0.2 mm
2
/0.5 mm) or 26 3,500 (1,067 m)
2400-series 24 (0.2 mm
2
/0.5 mm) or 26 3,500 (1,067 m)
6400-series 24 (0.2 mm
2
/0.5 mm) or 26 3,500 (1,067 m)