3.3.27  
STMI2 
 

Introduction  
STMI2 (Subscriber Trunk Module IP) is a VoIP gateway board (VoIP - Voice over IP) which provides the functionality of HG 1500 in HiPath 3800. This includes:
 •   Connection of a local LAN to the HiPath 3800 and connection with external LANs via the ISDN and DSL interfaces of HiPath 3800.
 •   Support for the conventional functions of an ISDN and DSL router with the additional functionality of a media gateway for the transfer of voice, fax and data.
 •   Forwarding of calls between IP-supported networks (LAN, intranet, Internet) and circuit-switched networks (ISDN, PSTN).
 •   Bidirectional video signal transmission on the SIP interface (OpenScape Personal Edition).
Configuration is performed via Web-Based Management (WBM) which enables the administration of HG 1500 without any special software requirements.
A combination of up to eight STMI2 boards can be used per system, but the following restrictions must be observed:  
 •   A maximum of four STMI2 boards may be inserted per HiPath 3800 cabinet.
 •   To allow for future channel expansion with extension modules, the slot between two STMI2 boards should remain free.
Information on configuration is provided in the HG 1500 administrator documentation .  
For information on how to calculate the number of boards required for HG 1500, see Section 2.5 "Dynamic Configuration Rules".

Board versions  

 Table 3-112   STMI2 - Board Variants
 Board  
 Part number  
 Services  
 DSPs  
 B channels  
 DSP channels  
STMI2  
S30810-Q2316-X100  
Voice and Data  
 2  
 32  
Sixteen simultaneous Voice over IP connections are possible per DSP (Digital Signal Processor).

Extension modules  
The STMI2 board has two HGA (HiPath Gateway Accelerator) slots, which can be used to connect the extension modules.
 Figure 3-76   STMI2 (S30810-Q2316-X100) - HGA Slots
 

Connections  
The STMI2 board features the following connections on the front panel:
 •   Two RJ45 jacks for LAN interfaces. These provide access to the Ethernet standard (IEEE 802.3) with 10 Mbps or 100 Mbps with automatic configuration. Manual configuration is also possible.
 •   9-pin Sub-D plug for V.24 interface

Front panel  
 Figure 3-77   STMI2 - Front Panel
 
An additional shielding panel is not required on the front side of this board, because the EMC shield is already provided by the front panel.

V.24 interface  
The V.24 cable (C30267-Z355-A25) is used for connecting the service PC.
The following settings must be chosen for a terminal or PC connected to the V.24 interface:
Transmission rate  
38,400 (default)  
Data bits  
8  
Parity bit  
None  
Stop bits  
1  
Data flow control  
None  
It is recommended that the local echo be deactivated on the connected terminal or PC.  

 Table 3-113   STMI2 - V.24 Interface Assignment
 Pin  
 Signal  
 I/O  
 Remark  
 1  
 DCD  
   
Not used  
 2  
 RXD  
 I  
Internal pull-up resistor in level switch (MAX211E)  
 3  
 TXD  
 O  
 
 4  
 DTR  
 O  
 
 5  
 0 V  
   
Ground  
 6  
 DSR  
 I  
Internal pull-up resistor in level switch (MAX211E)  
 7  
 RTS  
 O  
 
 8  
 CTS  
 I  
Internal pull-up resistor in level switch (MAX211E)  
 9  
 RI  
   
Not used  

LAN interfaces  

 Table 3-114   STMI2 - LAN Interface Assignment (RJ45 Jacks)
 Pin  
 Signal  
 1  
TDP (Transmit Data +)  
 2  
TDN (Transmit Data -)  
 3  
RDP (Receive Data +)  
 4  
TT1 (Transmit Termination 1)  
 5  
TT2 (Transmit Termination 2)  
 6  
RDN (Receive Data -)  
 7  
RT1 (Receive Termination 1)  
 8  
RT2 (Receive Termination 2)  
Signals TT1/2 and RT1/2 are not needed for transmitting data. They represent a signal termination of 100 ohms (so-called Bob Smith termination) for the two unused wire pairs in a 4-pair twisted pair cable.  

HiPath 3000/5000 V9, Service Documentation, Issue 7   up Top
Disclaimer & Copyright   ID: P31003H3590S100017620   2012-06-25