| Function and Feature | Description |
| Basic functions | Transparently transmits one channel of GE signals. |
| Interface specifications | Provides one 1000BASE-SX/1000BASE-LX/1000BASE-VX/1000BASE-ZX Ethernet optical port that supports auto-negotiation and complies with IEEE 802.3z; uses hot-swappable SFP optical modules.
The GE optical port supports single-fiber bidirectional optical modules. |
| Format of service frames | Ethernet II, IEEE 802.3, or IEEE 802.1q/p
Supports a frame length ranging from 64 bytes to 9,600 bytes. |
| Maximum uplink bandwidth | 4xVC-4 |
| VCTRUNK | 1 |
| Encapsulation format | Supports HDLC, LAPS, and GFP-F. |
| Service level and Concatenation granularity | VC-3, VC-4, VC12-Xv (X ≤ 63), VC3-Xv (X ≤ 12), and VC4-Xv (X ≤ 4) |
| Ethernet service | Supports EPL. |
| MTU | Supports the setting of the packet length (ranging from 1,518 bytes to 9,600 bytes). After the new resetting takes effect, the
permissible maximum length of the packets accessed at the IP interface depends on the MTU settings. |
| MPLS | Not supported |
| VLAN | Supports transparent VLAN transmission. |
| LPT | Supports point-to-point Link State Pass Through (LPT). |
| Multicast | Not supported |
| ETH-OAM | Supports the continuity check (CC) for the multicast services, loopback (LB) test for the unicast services, network loopback
detection (LD), link trace (LT) test, auto-negotiation, fault diagnosis, and link performance check. |
| CAR | Not supported |
| Flow control | Supports the GE port-based IEEE 802.3x flow control. |
| LCAS | Dynamically increases or decreases the bandwidth and realizes the protection function, compliant with the ITU-T G.7042
Recommendations. |
| Ethernet test frame | Supports the reception and transmission of Ethernet test frames. |
| Ethernet performance monitoring (RMON) | Supports Ethernet performance monitoring at the port level. |
| Alarm and performance event | Provides rich alarms and performance events for easy management and maintenance of the equipment. |
