iPECS UCP - Sltms (Single Line Telephone Gateway Module); Sltm4

iPECS UCP
Hardware Description and Installation Manual Issue 1.3
27
3.1.8 SLTMs (Single Line Telephone gateway Module)
3.1.8.1 SLTM4
The SLTM4 (Single Line Telephone Module) allows standard analog Single Line Telephone (SLT)
devices access to CO Lines, other stations, and most features of the system using “dial codes”.
The SLTM4 provides interface circuitry for four (4) SLTs. Each interface is equipped with
appropriate speech codec and compression functions, -40 volt DC feed circuit, pulse and DTMF
dial signal detection. A ring generator and message wait source are integrated in the SLTM4. The
SLTM4 supports T.38 protocol for Fax over IP.
The SLTM4 allows Single Line Telephones to be connected up to 4 Kilometers (13,000 feet) from
the gateway using 24 AWG wire.
The SLTM4 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 3.1.8.1-1, the front panel of the SLTM4 has:
 Power jack for the AC/DC adapter; see 3.1.15 AD/DC adapter –G-
 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
 Two (2) green power status LED
PWR1 - + 5 VDC
PWR2 - + 3.3 VDC
 Four (4) SLT LEDs, one for status of each SLT
 Reset Switch
 DB-9 RS-232 connector,
On the rear panel, the SLTM4 has:
 Four (4) RJ-45 female connector
 Ground Lug
 Fifty (50)-pin back plane connector
Figure 3.1.8.1-1 SLTM4 Front & Rear Panels