---
oid: "1.3.6.1.4.1.562.36.2.1.60.5.10.1.9"
asn1-notation: "{iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 562 msCarrier(36) mscPassport(2) mscComponents(1) mscTrk(60) mscTrkLCh(5) mscTrkLChOperTable(10) mscTrkLChOperEntry(1) mscTrkLChMode(9)}"
description: "mscTrkLChMode OBJECT-TYPE"
classification: "MIB object for network management"
last-modified: "2017-12-20"
---

## OID : `1.3.6.1.4.1.562.36.2.1.60.5.10.1.9`

```asn1
{iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 562 msCarrier(36) mscPassport(2) mscComponents(1) mscTrk(60) mscTrkLCh(5) mscTrkLChOperTable(10) mscTrkLChOperEntry(1) mscTrkLChMode(9)}
```

### Description

```asn1
mscTrkLChMode OBJECT-TYPE
SYNTAX INTEGER {
unknown(0),
hdlcFrmMux(1),
aal5FrmMux(2),
spoFrmMux(3),
spoFrmMap(4),
aal5FrmMap(5),
cellMap(6) }
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This attribute gives the operational mode of the LogicalChannel
component. It indicates what kind of transport is being performed
on the packets in the channel. There are 7 possible values of this
attribute as follows:

unknown - not currently in busy state, type of forwarding not
determined yet.

hdlcFrmMux - frames are being multiplexed (multiple LCh/n on
same port or channel) using HDLC encapsulation.

aal5FrmMux - frames are being multiplexed (multiple LCh/n on
same ATM VCC) using the AAL5 segmentation and recombination
protocol.

spoFrmMux - frames are being multiplexed (multiple LCh/n on
same ATM VCC) using the Short Path Oriented segmentation and
recombination protocol. This is a proprietary protocol which
encapsulates voice frames into a single ATM cell unlike AAL5
which would require two cells to transport the 45 byte voice frames.

aal5FrmMap - frames are being mapped (a single LCh/n per ATM
VCC) using the AAL5 segmentation and recombination protocol.
AAL5 mapped frames are forwarded by hardware in both directions
and require no CPU intervention.

spoFrmMap - frames are being mapped (a single LCh/n per ATM
VCC) using the Short Path Oriented segmentation and
recombination protocol. SPO mapped frames are forwarded by
hardware in both directions and require no CPU intervention in all
but one special case. In particular CPU is required only if frames
are being forwarded to an LCh/n whose mode is spoFrmMux.

cellMap - ATM cells are being relayed directly over the bus with no
segmentation and recombination protocol. The segmentation and
recombination is only done at transition points between frame based
cards and ATM cell based cards so this hop represents a pure
tandem cell hop, ATM card to ATM card. No CPU is required to
process these cells."
```

**Classification**: MIB object for network management

### Child OIDs

No child OID

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