3Com MSR 50, MSR 30 manual Related command cas and select-mode, CAS view, 2677

2677

Parameter timeslots-list: Timeslot range. Timeslots are numbered 1 through 31 on an E1 interface and 1 through 24 on a T1 interface. You may specify a single timeslot by specifying a number, a range of timeslots by specifying a range in the form of number1-number2, or several discrete timeslots by specifying number1, number2-number3. Examples are 1-14, 15, 17-31.

dual: Bidirectional trunk.

in: Incoming trunk.

out: Outgoing trunk.

Description Use the trunk-directioncommand to configure the R2 signal trunking direction.

Use the undo trunk-directioncommand to restore the default.

By default, bidirectional trunking applies.

This command applies to R2 signaling only.

An incoming trunk carries incoming calls but not outgoing calls while the outgoing trunk does the contrary. A bidirectional trunk carries both incoming calls and outgoing calls.

For R2 signaling to operate normally for call connection, you need to ensure that the trunking mode is incoming at one end of the trunk and outgoing at the other end. If both ends are using bidirectional trunking mode, use the select-modecommand to tune trunking policy. This is to prevent timeslot contention.

In addition, avoid using bidirectional trunking mode at one end and outgoing mode at the other end, because this can lead to failures of outgoing calls at the end in bidirectional trunking mode.

Related command: cas and select-mode.

Example # Set the trunking mode to bidirectional for TS group 5 on interface E1 1/0.

<Sysname> system-view [Sysname] controller e1 1/0

[Sysname-e1 1/0] timeslot-set 5 timeslot-list 1-31 signal r2 [Sysname-e1 1/0] cas 5

[Sysname-cas1/0:5] trunk-direction timeslots 1-31 dual

ts

Syntax	ts { block open query reset } timeslots timeslots-list
View	CAS view
Parameter	block: Blocks the trunk circuit of specified timeslots to make it unavailable.
	open: Opens the trunk circuit of specified timeslots, allowing it to carry services.