Interface Configuration Guide 7705 SAR Interfaces
Edition: 01 3HE 11011 AAAC TQZZA 39
When the 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card is configured in 4-port
OC3/STM1 mode, four SFP ports are available for optical and electrical SFP
transceivers. In this mode, the card supports OC3 SONET or STM1 SDH
transmission.
When the 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card is configured in 4-port
OC3/STM1 mode, channelization is supported down to the DS1 level. To change
port types, all ports must first be shut down. The ports can be configured for DS1 (T1)
or E1 channelization in access mode, or PPP/MLPPP or POS in network mode. All
ports on the card must be either SONET or SDH; there cannot be a mix of the two
types. When the first port is configured on a card, all other ports on the card must be
set to the same type. Switching between port types causes the adapter card to reset.
When the 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card is configured in 1-port
OC12/STM4 mode, SFP port 1 is available for optical SFP transceivers. Ports 2
through 4 are not available. In this mode, the card supports OC12 SONET and STM4
SDH transmission. The 1-port OC12/STM4 mode is designed for use in situations
where greater bandwidth is required on a single port.
3.1.3.2.5 4-port DS3/E3 Adapter Card
The 4-port DS3/E3 Adapter card has four TDM DS3/E3 ports. The port type must be
configured to be either DS3 or E3. Each DS3 port can be clear channel or
channelized down to DS0 (64 kb/s). E3 ports can be clear channel only. Once the
first port type has been configured, all other ports on the same 4-port DS3/E3
Adapter card must be set to the same type.
To change between types, the ports must first be deleted. DS3 ports provide B3ZS
(bipolar with three-zero substitution) zero code suppression and E3 ports provide
HDB3 (high density bipolar of order 3) zero code suppression. B3ZS and HDB3 zero
code suppression are line coding techniques.
Channelization is supported down to the DS0 level (for DS3 ports only). To change
port types, all ports must first be shut down. The ports can be configured for DS1 (T1)
or E1 operation. All ports on the card must be either T1 or E1; there cannot be a mix
of the two types. When the first port is configured on a card, all other ports on the
card must be set to the same type.
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