Comtech EF Data CDM-625 - Manual (Page 110)

CDM-625 Advanced Satellite Modem Revision 15
Front Panel Operation MN-CDM625
5–10
5.2.1.2 CONFIG: Mode
MODE is a key parameter when configuring the modem. To simplify the menu
choices, you must first determine the INTERFACE and FRAMING type for both
Transmit and Receive. Once these have been selected, you are presented only with
menu choices that are applicable to those particular modes. For example:
• If selecting a G.703 interface, the data rate menu is restricted to only the
appropriate G.703 rates.
• If selecting an IDR framing mode, the data rate choices are limited to only
those rates specified by IESS-308.
Mode: Tx=RS422:NONE Rx=RS422:None
(422,V35,G703s,Audio,LVDS,HSSI,IP,ASI)
The screen shown here depicts an Interface Type menu screen. You may select Interface Type
and Framing for both Tx and Rx from this menu. Use the ◄ ► arrow keys to select the
parameter to edit. The bottom line indicates the available options for the active parameter. Not
all options are always available – they depend on other settings or on the modem’s activated
FAST options.
The first parameter is the Interface Type. The options are:
► IP-ACM ► LVDS ► RS422
► G.703s: ► HSSI ► V.35
o G.703B (Balanced) ► IP ► Audio
o G.703U (Unbalanced) ► ASI
Interface Notes:
1. The IP-ACM mode choice restricts the available framing types to NONE or EDMACs.
Chapter 17. ADAPTIVE CODING AND MODULATION (ACM)
2. The list of available Interface Types includes Audio when a unit ships with the Two
Channel Audio Drop Hardware Option installed. The Audio mode choice permits you
to carry 2 x 32 kbps ADPCM audio as the primary data. This mode restricts the
available framing types to IBS or EDMAC (see the selection table and the
explanations on the next page).
Use the ▲▼ arrow keys to scroll through the available options, and then press ENTER.
If the cursor is on the second parameter – the Framing Type – the display appears as shown:
Mode:Tx=RS422:NONE Rx=RS422:None
(None IBS IDR D&Is EDMACs ESC++)