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## Create MQ Channels between Queue Manager on zCX and z/OS 

A channel is a logical communication link. In IBM MQ, there are two kinds of Channels: 

GLYPH<SM590000> Message Channel 

GLYPH<SM590000> MQI Channel 

We create Message channels between the Queue Managers. A message channel connects two queue managers. These channels are unidirectional because messages are only sent in one direction along the channel. There are subtypes of message channel, with the different types distinguished by these factors: 

GLYPH<SM590000> Are they used for receiving or sending messages? 

GLYPH<SM590000> Do they initiate the communication to the partner queue manager? 

GLYPH<SM590000> Are they used within a cluster? 

A channel definition on one queue manager must be matched with a channel definition of the same name with an appropriate subtype on the partner queue manager. 

We define a SENDER channel on one queue manager with an identically named RECEIVER channel on a second queue manager. We also create the appropriate Transmission Queues for the channels. In this document, we do not focus on the MQ commands for creating the channels, because we assume that the reader knows how to create those. 

GLYPH<SM590000> Create Message Channels on QMZCX 

Table 8-2 lists the channels that must be created on Queue Manager QMZCX. 

<img src='content_image/994811.jpg'>

GLYPH<SM590000> Create Message Channels on z/OS Queue Manager MQZ1 

Table 8-3 lists the channels that must be created on Queue Manager MQZ1 on z/OS. 

<img src='content_image/994812.jpg'>

This completes creation of the message channels for Queue Manager communication. 

## Start SENDER channels, including debugging protocols 

Typically, channels are configured to start automatically when messages are available on the associated transmission queue. We start the SENDER channels manually to make sure that 

