Multi-Tech Systems MVP-2410 User Manual

 

    

CAS Protocol 

E&M Immed Strt
E&M Wink Start 
E&M Wink with 

dial tone 

FXO Ground Strt
FXO Loop Start 
FXS Ground Strt 
FXS Loop Start 
MFR2ITU 
MFR2 China 
MFR2 ANI 

Channel Associated Signaling 
(CAS) is a method of 
incorporating telephony 
signaling info into an E1 
voice/data stream.  In CAS, the 
signaling bits (the A, B, C, and 
D bits) are multiplexed into the 
signal stream of each E1 
channel.  (By contrast, in 
Common Channel Signaling 
(CCS), one channel handles 
signaling for all other channels.)  
Each CAS protocol defines the 
states of the signaling bits 
during the various stages of a 
call (IDLE, SEIZED, ANSWER, 
RING-ON, RING-OFF).  

The CAS protocol code allows 
the VOIP to  interact properly 
with the PBX or central-office 
switch that it serves.  The need 
to download CAS protocols 
arises for only a small minority 
of VOIP users, and only when 
PBX/switch is found to be 
incompatible with standard 
protocols. 

Match this parameter to the 
setting of PBX or central-office 
switch. 

FXS Options – 
No Response 
Timer 

1 – 65535  
(in seconds) 

Length of time before call 
connection attempt is 
abandoned.  Applicable only 
when FXS  is selected as CAS 
protocol.