IPECS Release 5
Hardware Description & Installation
Issue 5.0
23
2.1.13 WTIM (Wireless Telephone Interface Module)
2.1.13.1
WTIM4
The four (4)-channel Wireless Terminal Interface gateway Module (WTIM4) provides four (4)
interfaces for GDC-400B, which is a DECT base station classified as the Remote Fixed Part
(RFP) in the DECT specification. DECT handsets can be used if the GDC-400B is connected to
a WTIM4 and the proper attendant programming is completed. The WTIM4 contains a processor
for IP to TDM voice and signaling conversion and DSP circuitry to provide transcoding for each
channel. The GDC-400B can be connected to the WTIM4 up to 600 meters from the gateway
using 24 AWG twisted pair cabling.
The WTIM4 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 2.1.13.1-1, the front panel of the WTIM4 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,
•
Four position Mode switch,
•
Eight (8) WTIM4 status LEDs,
•
Two RJ-45 Sync connectors to link WTIMs
•
DB-9 RS-232 connector,
•
Reset
Switch.
On the rear panel, the WTIM4 has:
•
Eight (4) RJ-45 female connectors,
•
Ground
Lug,
•
Fifty (50)-pin back plane connector,
Figure 2.1.13.1-1 WTIM4 Front & Rear Panels
