Comtech EF Data CDM-750 - Manual (Page 88)

CDM-750 Advanced High-Speed Trunking Modem Revision 2
Front Panel Operation MN-CDM750
5–10
After configuring the Tx side of the link, configure the Rx side of the link for Single
Stream or MultiStream Mode. You only need to configure the Rx Symbol Rate, Gold‐n
Index Code, and the correct selection of interfaces:
Step Task
1 Configure the Rx Symbol Rate. Use the W X arrow keys to select the
CONFIG: Rx→ Data→ Rx Symbol Rate menu. Set the Rx Symbol Rate to
match the far side modem Tx Symbol Rate.
2 Set the Gold‐n Index Code. Use the W X arrow keys to select the
CONFIG: Rx→ Pilot menu. Set the Rx Gold‐n Index Code to match the
far side modem Tx Gold‐n Code.
3 The interfaces should already have been properly selected and
configured during the Tx configuration tasks explained in 5(A).
5.2.2.1.2 (CONFIG) INTF: PIICX = G703
This menu is not accessible if a PIIC G.703 E3/T3/STS‐1 module is not installed in a
PIIC slot.
PIICX: IntfType ClkSource RxBuffer Mask
G703-Off ()
Where X designates the optional G.703 interface as being installed in Plug‐In Interface Card slot 1
(PIIC1) or slot 2 (PIIC2): Use the W X arrow keys to select IntfType, ClkSource, RxBuffer, or Mask,
and then press ENTER.
Typical for all configurations, the state of the PIIC interface is displayed on the bottom line. The
first half of this indication displays the installed state of the module – in this example, this display
confirms that the G.703 E3/T3/STS‐1 module is installed into the PIIC slot. The second indication
displays the operational state of the installed module – this display example confirms that, while
the module is installed, the interface is Off (i.e., not in use).
(CONFIG: INTF) PIICX (G703) Æ IntfType
Interface Type: NONE
()
Use the ST arrow keys to select NONE, T3, E3 or STS1, and then press ENTER.
Selecting NONE disables the interface. The CONFIG: Intf menu will display the
operational status for that slot as Off. Otherwise, All other selections enable the
PIIC interface for the appropriate interface type.
In Single Stream (non‐multistream) Mode, enabling a G.703 PIIC interface and the selection of
T3, E3 or STS1 will fix the data rate of the modem to the appropriate speed. Symbol rate will be