IPECS Release 5
Hardware Description & Installation
Issue 5.0
13
2.1.6.2
SLTM8
The eight (8)-port Single Line Telephone Module (SLTM8) allows standard analog Single Line
Telephone (SLT) devices access to CO Lines, other stations, and most features of the system
through the use of “dial codes”. The SLTM8 provides interface circuitry for eight (8) SLTs. Each
interface is equipped with appropriate speech codec and compression functions, 48 volt DC feed
circuit, pulse and DTMF dial signal detection. A ring generator and message wait source are
integrated in the SLTM8. The SLTM8 supports T.38 protocol for Fax over IP.
The SLTM8 allows Single Line Telephones to be connected up to 4 Kilometers (13,000 feet) from
the gateway using 24 AWG wire.
The SLTM8 includes a 10/100 Base-T Ethernet interface as well as packet voice processing
functions. The Ethernet port incorporates auto MDI, MDIX switching, therefore, both straight and
cross cables can be used.
As shown in Figure 2.1.6.2-1, the front panel of the SLTM8 has:
•
Power jack for the AC/DC adapter; see section 2.1.15
AD/DC adapter –G-,
•
Power status LED,
•
Normal/Service switch – In Service mode, circuits in use
are busied as they return to idle,
•
RJ-45 Female LAN connector with Speed and Link/Activity
LEDs,
•
Eight (8) SLT LEDs, one for status of each SLT,
•
DB-9 RS-232 connector,
•
Reset
Switch.
On the rear panel, the SLTM8 has:
•
Eight (8) RJ-45 female connectors,
•
Ground
Lug,
•
Fifty (50)-pin back plane connector.
Figure 2.1.6.2-1 SLTM8 Front & Rear Panels
