Description: This object specifies the direction in which CAS calls will be accepted on this endpoint. If this object is set to

bidirectional(1): VISM can send and receive calls on this endpoint incoming(2) : calls from the connected PBX will be accepted by VISM on this endpoint. outgoing(3) : VISM will send calls towards the connected PBX and not accept calls from the PBX.

The main difference between bidirectional and one-way trunks is the occurrence of glare. On bidirectional trunks, since both VISM and the connected PBX can seize the endpoint at approximately the same time, glare (dual seizure) is likely to occur. The protocol assigned to a bidirectional endpoint should be capable of detecting and resolving glare. Wink-start and delay-dial are examples of protocols capable of glare handling and immediate-start, ground-start and loop-start, of those that cannot.

This object cannot be configured if the signaling type for the DS1 line to which this ds0 belongs is non-CAS.

For a CAS line, this object can only be configured after associating this ds0 with an endpoint. This means that if no endpoint was added for this Ds0, any configuration set attempt will be rejected, but any get will be allowed.