C.4 setting up modems (cdm-qx/qxl only) – Comtech EF Data CRS-311 User Manual
Page 186
CRS-311 1:1 Redundancy Switch
Revision 7
Appendix C
MN/CRS311.IOM
C–6
C.4
Setting Up Modems (CDM-Qx/QxL only)
CDM‐Qx Multi‐Channel Satellite Modem Installation and Operation Manual
•
Local Traffic Modem
on Switch:
o
MCA = (Switch RCA) + (100)
o
Set EDMAC Framing on.
o
Set as EDMAC master.
o
Set with EDMAC Slave Address Range, ESA = (Modem RCA) + 10
•
Distant Modem 1
(attached to the Distant end of link to Traffic Modem):
o
Remote control address: no setting required (Remote control not used).
o
Set EDMAC Framing on.
o
Set as an EDMAC slave.
o
Set Slave Address, ESA = (Master ESA) + 1
o
MCA = ESA
• Two Distant Modems in a 1:1 configuration:
Set up the online modem as for Distant Modem 1, described previously in this section.
The offline modem is automatically configured to match the online modem. M&C can
only be achieved to the online modem.
Notes:
1. 1:1 internal redundancy in EDMAC Slave mode is available only in Firmware Version 1.6.2 or
later.
2. It is not possible for the offline modem of a 1:1 pair to respond to EDMAC messages directly
as it is not transmitting. Using the internal 1:1 link, the online modem polls and retains the
off‐line modem status. Depending on the modem, this information can be obtained as
follows:
Use FLT (Faults and Status) – FLT? for queries. This command/query is available in available
in Firmware Versions 1.6.2 or later.