Northern UTA220/UTA220k manual Placing A Bonding Call, Disconnecting A Bonding Call

BONDING

PLACING A BONDING CALL

You can place a call from port 1 or port 2 using any normal means. The answering party must be set to run BONDING or the call will disconnect shortly after connection. If you specify a rate multiplier of 2 and the answering party indicates it will support 2 or more channels for BONDING, the answering side will pass the directory number for the second call in the negotiation. The second call is made automatically. You can tell this call is being made by the flashing LED on the second B-channel. If delay equalization between the channels is obtained, data mode is entered. The front panel indicates the BONDING connection, the B-channel line speed (56 or 64 kbps), and the DTE speed (56, 64, 112, or 128 kbps). The B-channel LEDs remain on when data mode has been entered.

Note: When a rate multiple of 2 is negotiated, both B-channels are used. The remaining ports are prevented from making circuit switched calls for the duration of the BONDING call.

If the rate multiple is set to 1 on either the originator or answerer, the second call will not be made and data mode will be entered immediately after negotiation. The second call will not be made and data mode will be entered immediately after negotiation. The screen will indicate the speed the call connected at.

The Directory Numbers configured in the D-channel setup tell the origination side what the second Directory Number is. If you are using a point-to-point line with only one Directory Number, on answering a BONDING call that is requesting two channels, this directory number will be sent to the origination side, which is the same number as the first one dialed. This is because a point-to-point line can receive two calls using the same Directory Number. AT&T 5E5/5E6 can also be configured to receive two calls using the same Directory Number. To use this capability, change port 1’s SEC CALL PORT (located under BONDING OPTIONS in CONFIGURATION / PORT) to 1 and set port 2’s SEC CALL PORT to 2.

DISCONNECTING A BONDING CALL

Disconnecting by any normal means disconnects all BONDING channels. If either channel is disconnected by the switch, the entire call is disconnected by the UTA220. The disconnection can be validated by the LCD screen indicating DISCONNECTED and the B1 and B2 LEDs being off.

10-2 UTA220/UTA220k